Under-screen Camera Display Backlight Light Leakage Control
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Solution Overview
Problem
Existing display technologies face challenges in achieving high screen ratios while ensuring integral display performance and reducing light leakage at the via hole of the backlight module, particularly when incorporating under-screen cameras.
Innovation Solution
A display device with a display panel divided into first, second, and third display areas, where the third area corresponds to electronic components like cameras. The backlight module includes specific light sources and a light guide plate with microstructures, allowing for controlled light distribution to minimize light leakage and ensure full-screen display functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an under-screen camera is arranged in a camera area at the edge or corner of the screen, then the camera can be hidden behind the display panel, but the camera area cannot display images which affects user experience and reduces the effective display area
Solution Approach 1:
The patent divides the backlight module into multiple independent light source groups (first light source group, second light source group, third light source group) corresponding to different display areas. The light sources are selectively controlled to be on or off based on the operational state of the under-screen camera, enabling localized light management without affecting the entire display area.
Solution Approach 2:
The patent implements dynamic control of the backlight module by selectively turning on or off different light source groups based on the camera's operational state. When the camera is active, the light source group corresponding to the camera area is turned off to prevent light leakage; when the camera is inactive, all light sources are turned on to maximize the display area.
2Reliability
If the backlight module has a via hole corresponding to the camera to allow light transmission, then the camera can receive light for shooting, but light leakage at the via hole affects the camera shooting quality and display performance
Solution Approach 1:
The patent segments the backlight module into multiple independent light source groups that can be controlled separately. This segmentation allows the system to turn off only the specific light source group corresponding to the camera area when the camera is active, while keeping other light source groups on to maintain display functionality in other areas.
Solution Approach 2:
The patent introduces a control module as an intermediary that coordinates between the camera's operational state and the backlight module's light source groups. The control module receives signals from the camera driver circuit and automatically adjusts the backlight accordingly, eliminating the need for manual intervention or complex mechanical structures.
3Area of stationary object
If additional module structures are added to achieve full-screen display with lift-type cameras or slide phones, then the screen ratio can be increased, but the device thickness increases which deteriorates user experience
Solution Approach 1:
The patent makes the backlight module multi-functional by enabling it to serve both display purposes and camera lighting purposes. The same backlight module structure is used to provide illumination for the display screen and, when needed, to provide controlled illumination for the under-screen camera by selectively turning off specific light source groups, eliminating the need for separate module structures.
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 effectively reduces light leakage at the via hole of the backlight module, maintains integral display performance, and enables true full-screen display operations without compromising camera shooting quality.
Implementation Method 1
a light guide plate; in the light guide plate, a light propagation ability in a first direction is greater than a light propagation ability in a second direction
Implementation Method 2
the light guide plate includes a light guide area and a light transmissive area... the light guide area is provided with a plurality of first microstructures
Data Source
AI summary
The present application provides a display device and a mobile terminal. The display device includes a display panel and a backlight module arranged on one side of the display panel. The display panel includes a first display area, a second display area arranged on one side of the first display area, and a third display area arranged within the second display area. The backlight module includes a via area, and the via area is arranged corresponding to the third display area. The backlight module includes a first light source arranged corresponding to the first display area and a second light source arranged corresponding to the second display area.