Light Shielding Block for Under-Display Camera Image Quality
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Solution Overview
Problem
Electronic devices with integrated cameras under display screens face image quality issues due to ambient light interference from opaque thin film transistors, which scatters light and reduces imaging quality.
Innovation Solution
Incorporating light shielding blocks between the second substrate and organic light emitters, positioned corresponding to thin film transistors, to shield ambient light and prevent scattering, while maintaining the display functionality by strategically placing these blocks on the capping layer or in grooves, ensuring minimal impact on the display apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If opaque thin film transistors are used in the driving circuit layer, then the display functionality is achieved, but ambient light scattering occurs which degrades camera image quality
Solution Approach 1:
A light shielding block is introduced as an intermediary component between the thin film transistor and the camera. This block selectively blocks ambient light paths while preserving the functional light paths from organic light emitters to the camera, thus mediating between display operation and image quality requirements
Solution Approach 2:
The light shielding block is positioned locally at specific locations corresponding to thin film transistors, rather than uniformly across the entire display. This localized approach shields only the harmful light scattering from transistors while maintaining overall display functionality and light transmission in other areas
2Measurement precision
If light shielding blocks are added to shield ambient light, then camera image quality improves, but device structure complexity increases
Solution Approach 1:
The light shielding block is merged with the capping layer structure, combining the protective function of the capping layer with the light shielding function in a single integrated component. This reduces the number of separate parts and simplifies the overall device structure
Solution Approach 2:
The capping layer is given multiple functions: it continues to provide its traditional protective and structural roles, and simultaneously serves as a light shielding block to block ambient light from reaching thin film transistors. This multi-functionality reduces the need for additional dedicated light shielding 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
The light shielding blocks effectively reduce ambient light interference, enhancing the camera's image quality by preventing stray light from entering the display apparatus and improving imaging under the display screen.
Implementation Method 1
The light shielding block is configured to shield ambient light irradiating to the thin film transistor when the camera acquires image
Data Source
AI summary
An electronic device includes a display apparatus and a camera. The display apparatus includes a first substrate, a driving circuit layer, a pixel definition layer, a common electrode layer, a second substrate, a capping layer and at least a light shielding block. The camera is at least partially disposed corresponding to the plurality of pixel holes and is configured to acquire image through the display apparatus. The light shielding block is configured to shield the ambient light when the camera acquires image.