Transparent Layer Prevents Interference Fringes in Display Panel
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Solution Overview
Problem
Interference fringes occur in display devices due to the interaction between the prism sheet and the reflective polarizer, leading to a deterioration in display quality, and existing methods fail to effectively prevent these fringes without compromising brightness.
Innovation Solution
Incorporating a transparent layer with a specific thickness between the reflective polarizing layer and the prism sheet, which maintains a consistent gap and prevents the narrowing that causes interference fringes, while ensuring high light transparency and minimal optical phase difference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a prism sheet and reflective polarizer are used to increase light utilization efficiency and brightness, then the brightness of the display device increases, but interference fringes occur between the prism sheet and reflective polarizer, deteriorating display quality
Solution Approach 1:
A transparent layer is introduced as an intermediary element between the prism sheet and the reflective polarizer. This transparent layer acts as a mediator that prevents direct optical interaction between the prism sheet's light-concentrating function and the reflective polarizer's polarization function, thereby eliminating the interference fringes while preserving both brightness enhancement mechanisms
Solution Approach 2:
The optical path is segmented by inserting the transparent layer, which divides the interaction between the prism sheet and reflective polarizer into separate zones. This segmentation prevents the harmful optical interference while maintaining the functional benefits of both components in their respective regions
2Device complexity
If the gap between the prism sheet and reflective polarizer is reduced to improve compactness, then the device structure becomes more compact, but the gap narrows causing interference fringes to occur
Solution Approach 1:
The transparent layer serves as a buffer intermediary that allows the gap between the prism sheet and reflective polarizer to be maintained at an adequate size even in compact designs. This intermediary prevents the gap from becoming too narrow, thereby preventing interference fringes while still achieving compact overall device structure
Solution Approach 2:
The transparent layer functions as a thin film structure that provides the necessary optical separation between the prism sheet and reflective polarizer. This thin film maintains the required gap distance to prevent interference fringes while contributing minimal thickness to the overall device compactness
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 reduces or prevents interference fringes, maintaining display brightness and improving display quality by ensuring the gap between the prism sheet and the reflective polarizer remains sufficient, even under external warping, without affecting the light transmission efficiency.
Implementation Method 1
the reflective polarizing layer transmits a first polarized component of the light incident on the incident surface to the exit surface and reflects a second polarized component of the light incident on the incident surface which is orthogonal to the first polarized component
Implementation Method 2
the transparent layer transmits the first polarized component and the second polarized component of the light incident on the second surface to the first surface and transmits the second polarized component reflected by the reflective polarizing layer to be incident on the first surface to the second surface
Implementation Method 3
interference fringes may occur between the prism sheet and the reflective polarizer... maintains a consistent gap and prevents the narrowing that causes interference fringes
Data Source
AI summary
In an embodiment, a display panel unit includes a reflective polarizing layer, a transparent layer, and a display panel. The polarizing layer transmits a first polarized component of light incident on an incident surface to an exit surface and reflects a second polarized component of the light. The transparent layer transmits the first and second polarized component of the light incident on a second surface to a first surface adhered to the incident surface and transmits the second polarized component reflected by the polarizing layer to be incident on the first surface to the second surface. The panel faces the exit surface, and selectively transmits the light exiting from the exit surface.