OLED Display Transmission Windows for Camera Diffraction
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Solution Overview
Problem
Conventional organic light emitting display devices with integrated cameras struggle to take accurate front-view pictures due to diffraction issues caused by the arrangement of pixels and mirror patterns, leading to unnatural image capture.
Innovation Solution
The organic light emitting display apparatus incorporates a 4*2 matrix configuration of pixels with a first mirror pattern that defines transmission windows every two or more pixels, positioned to allow a larger distance between adjacent windows, and features a camera aligned with these windows, which can be square or circular with rounded edges, to minimize diffraction and enhance image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a camera is positioned on the boundary of the display apparatus to take front-view pictures, then the display apparatus can capture images, but diffraction occurs due to the pixel and mirror pattern arrangement causing unnatural picture images
Solution Approach 1:
The display panel is divided into multiple pixel regions (first through eighth pixels) with different mirror pattern configurations. Specifically, certain pixels have transmission windows while others have reflective mirror patterns, creating segmented functional zones that allow the camera to capture images through transmission windows while maintaining display functionality in other areas.
Solution Approach 2:
Different regions of the display panel have different optical properties. The transmission windows are strategically positioned in specific pixels (e.g., first and fourth pixels, or first and seventh pixels) to serve as camera access points, while other pixels maintain full reflective mirror patterns for normal display function. This local differentiation resolves the contradiction by providing dedicated imaging zones without compromising overall display quality.
2Adaptability or versatility
If transmission windows are formed in every pixel to allow camera access, then image capture is enabled, but diffraction effects increase causing picture deterioration
Solution Approach 1:
Instead of creating transmission windows in every pixel (excessive action), the invention uses partial action by forming transmission windows only in specific selected pixels (e.g., one transmission window in every two or more pixels). This partial implementation provides sufficient camera access capability while minimizing the total number of transmission windows, thereby reducing diffraction effects and maintaining picture quality.
Solution Approach 2:
The invention changes the spatial distribution parameter of transmission windows, positioning them with specific distances between adjacent windows (larger than the pixel width and length). This parameter optimization reduces diffraction effects by increasing the spacing between transmission window apertures, thereby resolving the contradiction between camera access and image quality.
3Quantity of substance
If the distance between adjacent transmission windows is reduced to increase their number, then more camera access points are provided, but diffraction effects worsen and picture quality decreases
Solution Approach 1:
The invention optimizes the distance parameter between adjacent transmission windows by setting it larger than the pixel width and length. This parameter change reduces diffraction effects while still providing sufficient transmission windows for camera functionality. The optimized spacing ensures that the number of transmission windows is adequate without causing excessive diffraction that would degrade picture quality.
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 reduces diffraction-related image deterioration, enabling the camera to capture clearer front-view images by increasing the distance between transmission windows and using rounded edges to further minimize diffraction effects.
Implementation Method 1
a first mirror pattern which defines an opening that is aligned with the light emitting structure. The first mirror pattern defines one transmission window in every two or more pixels adjacent each other
Implementation Method 2
the transmission window transmits light, and the camera is positioned to take a picture through the transmission window
Data Source
AI summary
An organic light emitting display apparatus includes first to eighth pixels arranged in a 4*2 matrix form along first and second directions, and includes a camera which is configured to take a picture. Each of the first to eighth pixels has a width in the first direction and has a length in the second direction. Each of the first to eighth pixels has a light emitting structure and a first mirror pattern which defines an opening which overlaps the light emitting structure. The first mirror pattern defines one transmission window in every two or more pixels adjacent each other, the transmission window passes light, and the camera is configured to take a picture through the transmission window.