In-Display Optical Sensor OLED Layout for Clear Image Capture
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Solution Overview
Problem
In OLED displays, light diffraction and interference from pixels and wirings degrade image quality for optical sensors like camera modules disposed behind the display.
Innovation Solution
The OLED display panel is divided into distinct regions with varying organic material arrangement and electrode configurations to enhance light transmittance for optical sensors, including lower pixel density and misaligned anode electrodes in the region housing the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If optical sensors are disposed at the back of the OLED display device, then the display area is maximized, but light diffraction and interference by pixels and wirings deteriorate image quality
Solution Approach 1:
The OLED display is divided into a first region corresponding to the optical sensor location and a second region for normal display. The first region has modified organic material arrangement regions with larger areas and misaligned electrode patterns, while the second region maintains standard pixel structures. This segmentation allows the display area to be maximized while creating a specialized zone that minimizes light diffraction and interference for the optical sensor.
Solution Approach 2:
The patent applies different structural characteristics to different regions of the OLED display. In the first region, the organic material arrangement regions have larger areas and electrodes are intentionally misaligned to reduce light diffraction. In the second region, standard high-density pixel structures are maintained for optimal display quality. This local differentiation resolves the contradiction by optimizing each region for its specific function.
2Manufacturing precision
If pixel density is increased to improve display resolution, then display quality improves, but light diffraction and interference increase affecting optical sensor performance
Solution Approach 1:
The display is segmented into two regions with different pixel densities. The second region maintains high pixel density for superior display resolution, while the first region has reduced pixel density with larger organic material arrangement regions. This segmentation allows the system to achieve both high display resolution and reduced light diffraction for the optical sensor by optimizing each region for its primary function.
Solution Approach 2:
Different pixel density characteristics are applied locally to different regions. The first region features larger organic material arrangement regions with misaligned electrodes to minimize diffraction, while the second region maintains standard high-density pixels for optimal visual display. This local quality differentiation resolves the contradiction between display resolution and light diffraction.
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 allows for clear image acquisition through optical sensors by minimizing light diffraction and interference, maintaining display functionality while optimizing sensor performance.
Implementation Method 1
organic light emitting diode display panel including a first region corresponding to where the optical sensor is disposed and a second region distinct from the first region
Data Source
AI summary
An electronic device of an embodiment of the present disclosure may include an optical sensor, and an organic light emitting diode display panel that includes a first region corresponding to where the optical sensor is disposed and a second region distinct from the first region. The organic light emitting diode display panel may include first organic material arrangement regions disposed in the first region, second organic material arrangement regions disposed in the second region, first electrodes disposed on a back surface of the first organic material arrangement regions, second electrodes disposed on a back surface of the second organic material arrangement regions, and a common electrode disposed on an upper surface of the first organic material arrangement regions and the second organic material arrangement regions. An area of the first organic material arrangement regions may be larger than an area of the second organic material arrangement regions.