Display Window Refractive Index Matching Pattern
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Solution Overview
Problem
Existing display devices have a limited display area and a significant non-display area, which restricts their functionality and user preference for wider display and narrower non-display regions.
Innovation Solution
A display device design incorporating a display module, a window with a bezel pattern, an optical film, an adhesive layer, and a refractive index matching pattern, which separates the display area into a first transmissive area for image transmission and a second transmissive area for natural light or infrared light transmission, optimizing the use of space and reducing optical signal loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a conventional display device design is used, then the structure is simple, but the display area is limited and the non-display area is large
Solution Approach 1:
The window is divided into multiple transmissive areas (first transmissive area for display images and second transmissive area for external light/infrared) separated by a bezel pattern. This segmentation allows different functional zones to coexist, maximizing the display area while maintaining structural organization through the patterned bezel design.
Solution Approach 2:
The refractive index matching pattern is introduced as an additional dimensional solution in the open area where the optical film is not located. This pattern, with a refractive index of about 90% to about 110% of the adhesive layer, addresses optical signal loss without adding physical bulk, thus expanding functionality while maintaining structural simplicity.
2Loss of energy
If the optical film covers the entire window area, then the structure is simple, but optical signal loss increases due to reflectance
Solution Approach 1:
The optical film is extracted from the open area corresponding to the second transmissive area, creating a purposeful gap. This extraction prevents optical signal loss by eliminating the reflective interface between the optical film and the adhesive layer in that specific region, while the refractive index matching pattern is introduced to manage reflections in the remaining areas.
Solution Approach 2:
The refractive index matching pattern acts as an intermediary element in the open area, with a refractive index of about 90% to about 110% of the adhesive layer. This intermediary reduces optical signal loss by minimizing reflectance at the interface between the adhesive layer and the surrounding structures, without requiring the optical film to cover the entire area.
3Area of moving object
If the bezel pattern is made wide, then the non-display area is reduced, but the transmissive area for images is compromised
Solution Approach 1:
The bezel pattern is segmented into multiple regions with different functions: the first transmissive area for image display, the second transmissive area for external light and infrared transmission, and the open area for optical film exclusion. This segmentation allows the bezel to serve multiple purposes simultaneously, maintaining display quality while enabling additional light transmission pathways.
Solution Approach 2:
The bezel pattern and open area configuration enable the window to perform multiple functions: displaying images through the first transmissive area, transmitting external natural light through the second transmissive area, and receiving infrared light for proximity sensing. This multi-functionality maximizes the utility of the non-display area while maintaining display performance.
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 design achieves a wider display area and a smaller non-display area, enhancing the device's functionality and user experience by improving light transmission and reducing reflectance, thus increasing operational reliability.
Implementation Method 1
The refractive index matching pattern is in the first open area and has a refractive index of about 90% to about 110% of a refractive index of the adhesive layer
Implementation Method 2
The optical film may include a polarizer and a retarder
Implementation Method 3
The optical film may include a polarizer and a retarder
Implementation Method 4
The adhesive layer couples the window and the optical film
Data Source
AI summary
A display device includes a display module, a window disposed above the display module, an optical film disposed between the display module and the window, an adhesive layer, and a refractive index matching pattern. The window includes a base substrate and a bezel pattern overlapping with the base substrate and defining a first transmissive area and a second transmissive area isolated from the first transmissive area in a plane view. The optical film includes a first open area defined therein to correspond to the second transmissive area. The adhesive layer couples the window with the optical film. The refractive index matching pattern is disposed in the first open area and has a refractive index of about 90% to about 110% of the adhesive layer. The first open area is defined as an area in which the optical film is not disposed.