Display Panel Light-Shielding Layer for Camera Integration
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Solution Overview
Problem
The screen-to-body ratio of mobile devices is limited due to the presence of a camera separate from the display screen, which occupies valuable display area and interferes with light sensors, affecting imaging quality.
Innovation Solution
A display panel design featuring alternating light-emitting and light-transmitting zones with a light-shielding layer, where the light-shielding layer is integrated into the substrate or between layers, ensuring the light-shielding layer's projected area covers non-light-transmitting zones outside the light-transmitting zones, preventing light interference with sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the camera is set outside the display screen, then the camera can function independently, but the screen-to-body ratio cannot be maximized and display area is reduced
Solution Approach 1:
The patent merges the camera and display screen into a single integrated structure where the light-transmitting zone of the display serves as the lens cover for the camera. The camera is positioned behind the display screen, sharing the same spatial footprint, thereby eliminating the need for separate camera openings and maximizing the screen-to-body ratio.
Solution Approach 2:
The display screen performs multiple functions: it serves as both the display interface and the protective cover for the camera lens. The light-transmitting zone of the display simultaneously acts as the optical pathway for the camera, combining protective, display, and optical functions into a single component.
2Area of moving object
If the camera is integrated into the display screen, then the screen-to-body ratio is maximized, but light from the display may interfere with the light sensor
Solution Approach 1:
The display screen is segmented into distinct functional zones: light-emitting zones for display and light-transmitting zones for camera operation. This spatial segmentation ensures that light generated for display purposes is directed away from the camera's light sensor, preventing interference while maintaining integration.
Solution Approach 2:
A light-shielding layer is introduced as an intermediary element between the light-emitting zones and the light-transmitting zones. This layer selectively blocks light from reaching the camera sensor while allowing the display function to operate normally, resolving the light interference issue.
3Measurement precision
If the light-shielding layer is added to prevent light interference, then imaging quality is improved, but the device structure becomes more complex
Solution Approach 1:
The light-shielding layer is merged with existing display structure layers, such as the pixel defining layer or encapsulation layers, rather than being added as a completely separate component. This integration approach prevents light interference while minimizing the increase in structural complexity.
Solution Approach 2:
Existing display layers are given additional functions by incorporating light-shielding properties. For example, the pixel defining layer that already serves to define pixel boundaries is also designed to provide light shielding, thereby performing multiple functions with a single layer.
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 design enhances the screen-to-body ratio by allowing light to pass through to sensors without affecting the display function, improving camera imaging and maintaining display performance.
Implementation Method 1
a light-emitting zone has a light-shielding layer to avoid the light in the display panel from entering a light-transmitting zone and interfering with a light sensor
Data Source
AI summary
A display panel and an intelligent terminal are provided. The display panel includes a plurality of light-emitting zones and a plurality of light-transmitting zones. Each of the light-emitting zones includes a substrate, a thin-film transistor layer disposed on the substrate, a pixel defining layer disposed on the thin-film transistor layer, and a light-emitting layer disposed on the pixel defining layer. Each of the light-emitting zones includes a light-shielding layer, wherein the light-shielding layer is disposed in the substrate and/or disposed between the substrate and the light-emitting layer.