OLED Display Transmissive Window Layout for Leakage Current Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Organic light emitting diode (OLED) displays experience leakage currents due to external light incidence, which affects their performance and efficiency.
Innovation Solution
The implementation of a light blocking member with multiple sub-members disposed in different layers between the pixels and transmissive windows, which blocks external light and reduces leakage currents by being electrically connected to power lines and strategically positioned to surround transmissive windows and transistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transmissive windows are provided to allow light transmission, then display brightness and visibility are improved, but leakage current increases due to external light incident on transistor semiconductor members
Solution Approach 1:
The light blocking member is divided into multiple sub-members (first, second, third, and fourth light blocking sub-members) positioned at different layers corresponding to different electrode members. This segmentation allows targeted blocking of light paths to semiconductor members while maintaining display brightness through the transmissive windows.
Solution Approach 2:
The light blocking structure is extended into the vertical dimension by placing light blocking sub-members at different layers (first layer, second layer, third layer, fourth layer) corresponding to different electrode members. This multi-layer approach blocks light from reaching semiconductor members without affecting the overall display brightness.
2Reliability
If light blocking members are added to reduce leakage current, then transistor reliability is improved, but device complexity increases
Solution Approach 1:
The light blocking member is electrically connected to power lines, merging the light blocking function with the existing power distribution network. This integration reduces device complexity by utilizing existing structural elements rather than adding completely separate components.
Solution Approach 2:
The light blocking member serves multiple functions: it blocks light from reaching semiconductor members to reduce leakage current, and it is electrically connected to power lines for potential additional functional integration. This multi-functionality reduces the need for separate components.
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 effectively reduces leakage currents in OLED displays, enhancing their performance and efficiency by blocking external light and preventing it from reaching the semiconductor members.
Implementation Method 1
a light blocking member disposed between one of the pixels and one of the transmissive windows... effectively reduces leakage currents in OLED displays, enhancing their performance and efficiency by blocking external light
Data Source
AI summary
An organic light emitting diode display includes a substrate, a plurality of pixels disposed on the substrate, a plurality of transmissive windows spaced apart from the pixels, and a light blocking member disposed between one of the pixels and one of the transmissive windows. The pixels display an image, and light is transmitted through the transmissive windows. Each pixel includes a transistor including a plurality of electrode members disposed in different layers on the substrate. The light blocking member includes a plurality of light blocking sub-members respectively disposed in the same layers as the plurality of electrode members.