Display Panel Light Shielding for Camera Module Integration
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Solution Overview
Problem
Display devices with high screen ratios face limitations due to the need for a through hole for camera modules, which can reduce the screen ratio and lead to light leakage issues from assembly errors between the backlight module and display panel.
Innovation Solution
The design incorporates a light transmission area surrounded by a light shielding area, allowing the camera module to be installed without a through hole in the display panel, and uses light shielding materials to prevent light leakage, including a frame that abuts against a light shielding portion to absorb light and secure the backlight module to the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a through hole is created in the display panel to accommodate the camera module, then the camera module can be installed, but the screen ratio is reduced
Solution Approach 1:
The patent extracts the camera module mounting function from the display panel by creating a mounting hole only in the backlight module, separating the camera installation requirement from the display panel structure. This allows the display panel to maintain its integrity and full screen area while the camera module is accommodated through the backlight module opening.
Solution Approach 2:
The backlight module serves as an intermediary structure that provides the mounting hole for the camera module. Instead of modifying the display panel directly, the backlight module acts as a mediator that absorbs the camera installation requirement, allowing the display panel to remain intact and maintain high screen ratio.
2Ease of manufacture
If assembly tolerance is not controlled strictly between backlight module and display panel, then manufacturing is easier, but light leakage occurs
Solution Approach 1:
The patent converts the potential harmful effect of assembly tolerance into a beneficial feature by designing the light shielding structure with sufficient margin. The light shielding portion extends beyond the mounting hole boundary, transforming the tolerance issue into a design advantage where the light shielding structure actively compensates for assembly variations rather than being a constraint.
Solution Approach 2:
The light shielding portion acts as a flexible optical barrier that can accommodate assembly variations. By extending the light shielding structure beyond the precise mounting hole boundary, it creates a tolerance buffer zone that prevents light leakage even when assembly tolerances are not tightly controlled, effectively using a flexible approach to rigid precision requirements.
3Object-affected harmful factors
If a light shielding area is added around the mounting hole, then light leakage is prevented, but the structure becomes more complex
Solution Approach 1:
The patent merges the light shielding function with the existing backlight module structure by integrating the light shielding portion into the backlight module's frame or housing. This combination eliminates the need for separate light shielding components, reducing overall structural complexity while maintaining effective light leakage prevention around the mounting hole.
Solution Approach 2:
The backlight module frame is designed to serve multiple functions: it houses the camera module, provides structural support, and incorporates the light shielding portion to prevent light leakage. This multi-functionality reduces the need for additional dedicated light shielding components, thereby simplifying the overall structure while achieving comprehensive light leakage prevention.
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 configuration increases the screen ratio by eliminating the need for a through hole and effectively prevents light leakage, ensuring improved display and imaging effects while maintaining structural integrity.
Implementation Method 1
uses light shielding materials to prevent light leakage, including a frame that abuts against a light shielding portion to absorb light
Data Source
AI summary
A display panel defines a display area surrounding a light transmission area, and a light shielding area between the display area and the light transmission area. The display panel includes a lower polarizer and a first light shielding material. The lower polarizer defines a first through hole. At least part of the first light shielding material is in the first through hole. The first light shielding material is aligned with the light shielding area and surrounds the light transmission area, so as to absorb light from a side of the lower polarizer away from the TFT array substrate toward the light transmission area. A display device using the display panel is also disclosed.