Display Bezel Light Leakage Control via Refractive Index Mismatch
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Solution Overview
Problem
Thin display apparatuses experience light leakage issues due to their reduced thickness, which affects visibility and reliability, particularly in the bezel area where light can pass through, causing a deterioration in image perception.
Innovation Solution
The display apparatus incorporates a second decoration member with a base member and a filling member having a refractive index lower than the base member, which guides light leaking through the bezel area to the edge of the display, reducing light leakage and enhancing visibility. The filling member, which can be air or a transparent polymer, is placed in recessed portions of the base member, and the base member is coupled with a cover member using an adhesive layer, improving the appearance by controlling light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the display apparatus is thinned to reduce thickness, then the thickness is reduced, but light leakage occurs in the bezel area causing deterioration in image perception
Solution Approach 1:
A light blocking layer is introduced as an intermediary element between the display panel and the cover member. This layer specifically addresses the light leakage problem in the bezel area without affecting the overall thinness of the display apparatus. The light blocking layer acts as a mediator that prevents harmful light transmission while maintaining the thin profile achieved through the stacked layer structure.
Solution Approach 2:
The light blocking layer is applied selectively in the bezel area rather than uniformly across the entire display apparatus. This local application targets the specific region where light leakage occurs, allowing the display area to maintain its optical transparency while the bezel area receives the light blocking treatment. This resolves the contradiction by applying the solution only where needed, preserving the thin design while eliminating the harmful light leakage effect.
2Length of stationary object
If layers are stacked in a close-packed manner to reduce thickness, then the thickness is reduced, but visibility and reliability are compromised
Solution Approach 1:
The display apparatus is segmented into multiple functional layers (display panel, touch panel, light blocking layer, cover member) that are stacked in a close-packed manner. Each layer performs a specific function, allowing the overall thickness to be minimized while maintaining the reliability of each individual component. The segmentation enables the light blocking layer to be inserted without significantly increasing the total thickness, thus preserving both thinness and reliability.
Solution Approach 2:
The display apparatus employs a composite structure consisting of multiple materials with different optical and mechanical properties. The light blocking layer uses materials specifically selected for their light-blocking characteristics in the bezel area, while other layers maintain transparency and touch sensitivity. This composite approach allows the thin design to achieve both visibility and reliability by combining materials that fulfill different functional requirements within the constrained thickness.
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 solution effectively reduces light leakage in the bezel area, improving the visibility of the image displayed and allowing for various bezel designs, thus enhancing the overall appearance and functionality of the display apparatus.
Implementation Method 1
a filling member in the at least one recess portion, and including a refractive index that is lower than a refractive index of the base member
Data Source
AI summary
A display apparatus includes a display member including a display area, and a peripheral area adjacent the display area, a cover member on the display member, a first decoration member between the display member and the cover member, and including a bezel area overlapping the peripheral area, and a transmission area adjacent the bezel area, and overlapping the display area, and a second decoration member between the first decoration member and the cover member, and including a base member defining at least one recess portion overlapping the bezel area, and a filling member in the at least one recess portion, and including a refractive index that is lower than a refractive index of the base member.