OLED Pixel Structure with Integrated Photo Sensor
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Solution Overview
Problem
Existing organic electroluminescence devices lack integrated touch sensing functionality, which is essential for modern portable and compact display technologies.
Innovation Solution
A pixel structure incorporating a scan line, data line, bias lines, a first switch device, a capacitor, a driving device, an organic light emitting device, a second switch device, and a photo sensor device, along with specific layers and connections, enables the organic electroluminescence device to perform both display and touch sensing functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional touch sensing components are added to the organic electroluminescence device, then touch sensing functionality is achieved, but device complexity increases
Solution Approach 1:
The patent merges the touch sensing function with the existing organic electroluminescence device by integrating a photo sensor device and additional switch devices into the pixel structure. The photo sensor device is electrically connected to the existing driving device and capacitor, allowing the same pixel structure to perform both light emission and touch sensing functions without requiring completely separate systems.
Solution Approach 2:
The pixel structure is designed to serve multiple functions: the organic light emitting device provides display functionality while the integrated photo sensor device enables touch sensing. The shared electrical connections and common substrate allow a single pixel structure to handle both visual output and tactile input, reducing the need for separate dedicated components.
2Adaptability or versatility
If more electrical connections and components are integrated into the pixel structure, then touch sensing capability is enabled, but manufacturing complexity increases
Solution Approach 1:
The patent segments the pixel structure into distinct functional modules: the existing organic light emitting device components (driving device, capacitor, organic light emitting device) and the added touch sensing components (photo sensor device, second switch device). This segmentation allows each module to be designed and manufactured independently before integration, simplifying the overall manufacturing process despite the increased functionality.
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 integrated pixel structure allows for effective touch sensing functionality within the organic electroluminescence device, enhancing its usability in portable and compact display technologies without requiring additional manufacturing processes beyond those for organic light emitting elements.
Implementation Method 1
an organic light emitting layer (130)
Implementation Method 2
a photo sensor device (T4)
Data Source
AI summary
A pixel structure of an organic electroluminescence device includes a scan line, and a data line, a bias line and a readout line on a substrate, a first switch device, a capacitor, a driving device, an organic light emitting device, a second switch device and a photo sensor device. The first switch device is electrically connected to the scan line and the data line. The capacitor is electrically connected to the first switch device and the bias line. The driving device is electrically connected to the first switch device, the capacitor and the bias line. The organic light emitting device is electrically connected to the driving device. The second switch device is electrically connected to the scan line and the readout line. The photo sensor device is electrically connected to the second switch device and the bias line.