Under-Display Camera Color Filter Layout for Clearer Image Capture
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Solution Overview
Problem
Electronic devices with cameras disposed under the display area face issues of reduced transmittance and image defects due to the overlap of camera and display layers, leading to phenomena like yellowish or rainbow effects in captured images.
Innovation Solution
The electronic device incorporates a colorless and transparent substrate with a pixel layer of organic light-emitting diode (OLED) type pixels, an organic encapsulation layer, and a color filter layer, where the pixel arrangement density is lower in the camera overlap area compared to non-overlapping areas, and includes a black matrix and transmission area in the color filter layer to minimize light diffraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the camera is disposed under the display area, then the display area can be expanded, but the transmittance in the camera overlap area is reduced
Solution Approach 1:
The patent applies local quality by creating a transmission area with different structural characteristics from the surrounding display area. In the camera overlap area, the pixel layer and color filter layer are removed to form a transparent region, while the surrounding non-overlap areas maintain complete display structures. This local modification allows light to pass through the camera overlap area without interference from display layers, resolving the transmittance issue while preserving the expanded display area.
2Area of stationary object
If the camera is disposed under the display area, then the display area can be expanded, but image defects such as yellowish or rainbow effects occur
Solution Approach 1:
The patent extracts the problematic display layers (pixel layer and color filter layer) from the camera overlap area. By removing these layers only in the region where the camera is disposed, the source of light interference and image defects is eliminated. The extracted layers are completely absent from the transmission area, allowing clean light transmission without the yellowish or rainbow effects caused by layer interference.
3Manufacturing precision
If pixels and wires are arranged densely in the camera overlap area, then the display resolution is improved, but the transmittance is reduced
Solution Approach 1:
The patent segments the display area into two distinct regions: a transmission area where the camera overlaps and a normal display area. In the transmission area, all pixel and wire structures are completely removed, creating a fully transparent zone. In the normal display area, complete pixel structures are maintained for high resolution. This segmentation allows the camera overlap area to have 100% transmittance while other areas maintain high resolution, eliminating the trade-off.
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 enhances transmittance in the camera overlap area and reduces image defects such as yellowish or rainbow effects, improving the quality of images captured by the camera.
Implementation Method 1
a pixel layer disposed in a first direction from the substrate and comprising organic light-emitting diode (OLED) type pixels
Implementation Method 2
a transmission area disposed between the first color filters in the first area... to enhance light transmission and reduce light diffraction
Data Source
AI summary
An electronic device may include: a housing; a display viewable through a portion of the housing; and a camera overlapping the display and configured to capture an image based on external light passing through the display. The display may include: a first area overlapping at least a portion of the camera and a second area not overlapping the camera; a substrate; a pixel layer disposed in a first direction from the substrate and comprising organic light-emitting diode (OLED) type pixels; wherein a color filter layer may include first color filters overlapping pixels of the first area, second color filters overlapping pixels of the second area, and a black matrix disposed between the second color filters.