Segmented Additional Polarizer Layout for Low-Reflection OLED Displays
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Solution Overview
Problem
Conventional light emitting display devices do not effectively address the issue of external light reflection, which can lead to reduced image quality and visibility of internal components.
Innovation Solution
A light emitting display device is designed with a polarizer and an additional polarizer on the front, where the additional polarizer includes a polarization portion overlapping the opening of an organic film and a non-polarization portion in other regions, minimizing the area covered by the additional polarizer to prevent luminance reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizer is added to the front of the light emitting display device to prevent external light reflection, then image quality is improved, but luminance is reduced
Solution Approach 1:
The additional polarizer is divided into two distinct portions: a polarization portion positioned over the opening area and a non-polarization portion positioned over the light emitting area. This segmentation allows different regions of the display to have different optical properties, enabling external light reflection prevention in the opening area while maintaining high luminance in the light emitting area.
Solution Approach 2:
Different portions of the additional polarizer have different functional qualities: the polarization portion has light-blocking properties to prevent external light reflection, while the non-polarization portion has light-transmitting properties to maintain display luminance. This local differentiation of optical properties resolves the contradiction between preventing reflection and maintaining brightness.
2Object-affected harmful factors
If the additional polarizer covers the opening area to prevent reflection, then image quality is improved, but the structure becomes more complex
Solution Approach 1:
The additional polarizer is segmented into polarization and non-polarization portions with distinct functions, allowing the structure to address multiple requirements simultaneously while maintaining a relatively simple overall configuration that can be integrated into the existing display stack.
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 solution effectively prevents external light reflection, maintaining high luminance and improving image display quality by ensuring that the additional polarizer does not overlap the light emitting area.
Implementation Method 1
a polarizer and an additional polarizer disposed on an upper portion of the phase delay layer
Implementation Method 2
a phase delay layer disposed on an upper portion of the display panel
Data Source
AI summary
A light emitting display device includes a display panel including a light emitting area and a non-light emitting area; a phase delay layer disposed on the display panel; and a polarizer and an additional polarizer disposed on the phase delay layer. The display panel includes a transistor disposed on a substrate, an organic film overlapping the transistor and including an opening, a first electrode, an emission layer disposed on the first electrode and disposed corresponding to the light emitting area, and a second electrode disposed, the first electrode, the emission layer, and the second electrode form a light emitting diode (LED), the additional polarizer includes a polarization portion overlapping the opening of the organic film in a plan view and a non-polarization portion disposed in a region where the polarization portion is not disposed, and the polarization portion is disposed in a portion of the non-light emitting area.