Patterned Light-Blocking Layer for Display Device
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Solution Overview
Problem
In organic light-emitting devices, external light is reflected on the connecting part of the cap and transmitted to the outside, causing unwanted white light bands on the display area.
Innovation Solution
A patterned layer made of light-blocking material is disposed on the substrate between the active area and the cap-attaching area to prevent external light from entering and reflected light from being transmitted to the outside, with the patterned layer optionally aligned perpendicular to or at an angle with the cap-attaching area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cap is attached to the substrate to cover the active area, then the active area is isolated from the outside, but external light is reflected on the connecting part of the cap and transmitted to the outside, causing unwanted white light bands
Solution Approach 1:
A light-blocking layer is introduced as an intermediary component between the substrate and the cap. This layer selectively blocks external light from reaching the connecting part of the cap, preventing the formation of reflected light bands while maintaining the isolation function of the cap. The light-blocking layer acts as a mediator that resolves the conflict between cap isolation and light reflection.
Solution Approach 2:
The cap structure is segmented into functional zones: the light-blocking layer is positioned in the transmission area between the active area and cap-attaching area, while the cap itself covers the active area. This segmentation allows different parts of the system to perform different functions - the light-blocking layer prevents light reflection, and the cap provides isolation.
2Ease of manufacture
If the transmission area is left open for substrate access, then manufacturing and assembly are easier, but external light enters through the transmission area and reflects on the cap
Solution Approach 1:
The light-blocking layer is selectively applied only in the transmission area where light blocking is needed, rather than covering the entire substrate or cap. This local application maintains ease of manufacture by leaving other areas accessible, while specifically addressing the light entry problem in the transmission area.
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
Effectively blocks external light from entering and prevents reflected light from being projected on the substrate, eliminating the unwanted white light bands and enhancing display clarity.
Implementation Method 1
A patterned layer made of light-blocking material is disposed on the substrate between the active area and the cap-attaching area to prevent external light from entering
Implementation Method 2
the reflected external light is transmitted to the outside through the transmission area disposed corresponding to the connecting part of the cap
Data Source
AI summary
The present invention relates to a display device preventing external light reflected in a region connected with plane parts disposed on a cap from transmitting to the outside, and an embodiment of the present invention may be achieved in a whole or in part by a display device comprising: a substrate; an active area disposed on the substrate; a line electrically connected to the active area, and disposed on the substrate; a cap attached to the substrate to cover the active area; and a patterned layer disposed on a transmission area disposed between the active area and a cap-attaching area to which the cap is attached.