OLED Light-Shielding Member for TFT Current Stability
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Solution Overview
Problem
Current OLED displays face challenges in reducing light-induced current reduction and improving image quality due to insufficient light shielding in semiconductor layers.
Innovation Solution
The implementation of a light-shielding member on the second thin film transistor in the OLED display, which overlaps with the source and drain regions of the second driving circuit, effectively shields incident light and enhances image quality by reducing light-induced current fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light-shielding member is added to shield incident light on the semiconductor layer, then light-induced current reduction is reduced and image quality is improved, but device complexity increases
Solution Approach 1:
A light-shielding member is introduced as an intermediary component between the incident light and the semiconductor layer. This member selectively blocks light from reaching the semiconductor layer, preventing light-induced current reduction while allowing the display to maintain its normal structure and function
Solution Approach 2:
The light-shielding member is positioned specifically over the semiconductor layer region where light-induced current reduction occurs. This localized shielding approach addresses the problem area without affecting other parts of the display, and the member can be integrated into the existing pixel structure
2Object-affected harmful factors
If the light-shielding member overlaps with the source and drain regions, then light shielding effectiveness is improved, but manufacturing precision requirements increase
Solution Approach 1:
The light-shielding member is merged with the existing pixel electrode structure or integrated into the same manufacturing layer. By combining the light-shielding function with an existing structural element, the patent reduces the need for separate alignment processes and lowers manufacturing precision requirements while maintaining effective light shielding over the source and drain regions
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 improves the OLED display's ability to maintain current levels and enhance image quality by effectively shielding light, thereby addressing the issue of current reduction and improving the overall performance of the display.
Implementation Method 1
a light-shielding member configured to shield incident light, disposed on the second thin film transistor
Data Source
AI summary
An organic light-emitting diode display is disclosed. In one aspect, the display includes a substrate that includes a first sub-pixel region and a second sub-pixel region adjacent to the first sub-pixel region, and a first driving circuit and a second driving circuit respectively disposed in the first sub-pixel region and the second sub-pixel region. The first and second driving circuits include a first thin film transistor (TFT) and a second TFT. The display further includes a first pixel electrode and a second pixel electrode electrically connected to the first driving circuit and the second driving circuit, respectively, and a common electrode facing the first and second pixel electrodes. A first organic emission layer is interposed between the first pixel electrode and the common electrode, and a second organic emission layer interposed between the second pixel electrode and the common electrode, and a light-shielding member is configured to shield incident light.