OLED Subpixel Photovoltaic Module for Optical Testing
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Solution Overview
Problem
Existing optical test methods for OLED display apparatuses are unable to accurately measure optical characteristics of the light-emitting layer due to significant errors in data acquisition.
Innovation Solution
Incorporating a photovoltaic conversion module within each subpixel to convert optical signals into electric signals, which are then acquired and processed by a testing terminal to calculate the actual optical characteristics of the light-emitting layer, allowing for precise measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an optical measurement instrument is used to measure optical data at a specified region of a panel and current flowing through a light-emitting layer is measured to estimate luminescence efficiency, then the testing method can be implemented, but the measurement precision is insufficient due to relatively great error in the testing method
Solution Approach 1:
A photovoltaic conversion module is introduced as an intermediary component between the light-emitting layer and the testing terminal. This module converts optical signals from the light-emitting layer into electric signals, which are then transmitted to the testing terminal for accurate measurement. This intermediary conversion process eliminates the need for indirect estimation methods, thereby improving both measurement precision and reliability of the testing method.
2Measurement precision
If existing optical test methods are used to measure optical characteristics, then the testing process can be performed, but the measurement precision of optical characteristics is insufficient due to inability to directly and accurately obtain optical data
Solution Approach 1:
The OLED display apparatus performs self-testing through the photovoltaic conversion module integrated within its structure. The module uses the light-emitting layer's own optical output to generate electric signals for measurement, enabling the device to test itself without requiring external optical measurement instruments. This self-service approach improves measurement precision while avoiding the complexity of external testing equipment.
3Reliability
If indirect estimation methods are used to acquire luminescence efficiency and light-emission evenness data, then the testing can be completed, but the reliability of the acquired data is insufficient due to relatively great error
Solution Approach 1:
The patent replaces indirect optical measurement methods with direct electrical signal measurement. The photovoltaic conversion module converts optical signals into electric signals that can be directly measured by the testing terminal with high precision. This substitution of measurement methodology eliminates the need for complex indirect estimation processes, improving data reliability without significant time loss.
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 method enables direct and accurate acquisition of optical data, improving the measurement of light-emitting efficiency and evenness across the OLED panel.
Implementation Method 1
at least one photovoltaic conversion module arranged in correspondence with the subpixel, and configured to receive an optical signal from the light-emitting layer of the corresponding subpixel and convert the received optical signal into an electric signal
Data Source
AI summary
The present disclosure provides an organic light-emitting diode (OLED) display apparatus, including a plurality of subpixels, each of which includes an anode, a cathode and a light-emitting layer. The OLED display apparatus further includes at least one photovoltaic conversion module arranged in correspondence with the subpixel, and configured to receive an optical signal from the light-emitting layer of the corresponding subpixel and convert the received optical signal into an electric signal. A testing terminal is extracted from the photovoltaic conversion module and configured to acquire the electric signal converted by the photovoltaic conversion module.