Mini LED Lamp Ring Layout for Under-Screen Camera Stray Light
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Solution Overview
Problem
The placement of a camera under an LCD screen causes imaging stray light crosstalk due to backlight leakage, which degrades the imaging quality, especially in harsh environments like fog or fog-like conditions, and conventional methods fail to effectively reduce this issue without compromising the screen-to-body ratio or aesthetic appeal.
Innovation Solution
Introduce a mini LED lamp ring between backlight modules, comprising a substrate, LEDs, and fluorescent powder, and control its state based on the camera's operation to block stray light during photography, while maintaining normal display functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the camera is placed under the LCD screen to increase screen-to-body ratio, then the aesthetic level is improved, but imaging quality deteriorates due to backlight leakage and stray light crosstalk
Solution Approach 1:
The backlight system is segmented into multiple independent zones: a first backlight module for display, a second backlight module for imaging, and a mini LED lamp ring for stray light control. This segmentation allows independent optimization of each module's function, enabling the camera to operate under the screen without compromising imaging quality through stray light interference.
Solution Approach 2:
Different regions of the backlight system are assigned different optical properties. The mini LED lamp ring specifically addresses the camera region by providing localized illumination control, while the first backlight module maintains display quality in other regions. This local quality differentiation resolves the contradiction by optimizing each region for its specific function.
2Shape
If the camera is placed under the screen with hole-digging method, then aesthetic level is improved, but imaging quality deteriorates due to black edge and light separation
Solution Approach 1:
The mini LED lamp ring acts as an intermediary light source between the display backlight and the camera. It provides a dedicated illumination path for the camera that is independent of the display backlight, eliminating the black edge effect and light separation issues while maintaining the aesthetic hole-digging design.
3Shape
If a reversible camera is used to maintain screen-to-body ratio, then imaging function is preserved, but reliability deteriorates due to connection line disconnection from frequent flipping
Solution Approach 1:
Instead of making the camera reversible (moving), the solution makes the camera fixed and the backlight system adaptable. The backlight modules and mini LED lamp ring are configured to accommodate the fixed camera position, inverting the approach from camera movement to system adaptability, thereby eliminating connection line stress while preserving screen-to-body ratio.
4Manufacturing precision
If the mini LED lamp ring is always on to block stray light, then imaging quality is improved, but energy consumption increases
Solution Approach 1:
The mini LED lamp ring operates periodically rather than continuously, activating only during camera operations when stray light control is needed. This periodic action maintains imaging quality during photography while significantly reducing energy consumption during display-only modes.
Solution Approach 2:
The illumination state of the mini LED lamp ring is dynamically adjusted based on camera operation status. The system transitions between on and off states according to real-time needs, optimizing the balance between imaging quality and energy consumption.
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
Effectively reduces imaging stray light crosstalk by blocking lateral light leakage, enhancing imaging quality during photography, and maintaining display functionality without compromising the screen-to-body ratio or aesthetic design.
Implementation Method 1
providing a mini light-emitting diode (Mini LED) lamp ring between backlight modules... effectively reduces imaging stray light crosstalk by blocking lateral light leakage
Implementation Method 2
the mini LED lamp ring includes a substrate for the mini LED lamp ring, a light-emitting diode (LED), and a fluorescent powder stacked sequentially
Data Source
AI summary
The present disclosure provides a method and apparatus for reducing imaging stray light crosstalk of a camera under an LCD screen. The method includes: providing a mini LED lamp ring between backlight modules, where the mini LED lamp ring includes a substrate for the mini LED lamp ring, an LED, and a fluorescent powder stacked sequentially; detecting a state of the camera; and determining the state of the camera, in response to the camera being in an on state, turning off the mini LED lamp ring, and in response to the camera being in an off state, turning on the mini LED lamp ring.