Display Camera Hole OCA Film and OCR Resin Air Gap Suppression
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Solution Overview
Problem
Display devices with cameras face challenges in achieving a narrow bezel design while maintaining transparency for image capture, suppressing air gaps, and improving waterproof performance.
Innovation Solution
The implementation of a display device structure that includes a cover glass, a liquid crystal panel with a transparent portion, an upper polarization plate with a through hole, an Optical Clear Adhesive (OCA) film, and an Optical Clear Resin (OCR) layer in the through hole, along with a backlight unit and a camera, which enhances transparency and prevents air gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the liquid crystal panel is expanded to the whole front surface to realize a narrow bezel, then the visible range is maximized, but the camera mounting region is compromised requiring punched through holes or transparent regions
Solution Approach 1:
The upper polarization plate is segmented by forming a through hole at the camera mounting position, separating the display area from the camera area. This allows the liquid crystal panel to be expanded to the whole front surface while maintaining camera functionality through the dedicated through hole region.
Solution Approach 2:
An Optical Clear Adhesive (OCA) film is introduced as an intermediary material between the cover glass and upper polarization plate. The OCA film fills the through hole region and provides optical clarity, enabling both the expanded display area and transparent camera region to coexist effectively.
2Adaptability or versatility
If punched through holes are provided in the liquid crystal panel and polarization plate for camera mounting, then camera integration is enabled, but air gaps are created affecting transparency and waterproofing
Solution Approach 1:
The OCA film serves as an intermediary material that fills the through hole formed in the upper polarization plate. This eliminates air gaps between the cover glass and polarization plate at the camera mounting position, thereby improving both transparency for image capture and waterproof performance.
Solution Approach 2:
The OCA film provides a homogeneous optical medium that replaces air in the through hole region. This homogenization of the optical path improves transparency, while the adhesive nature of the OCA film ensures uniform sealing for waterproofing.
3Reliability
If transparent portions are provided in the liquid crystal panel for camera access, then image capture is enabled, but structural integrity and sealing are compromised
Solution Approach 1:
The OCA film acts as an intermediary sealing material that fills the through hole in the upper polarization plate above the transparent portion of the liquid crystal panel. This maintains structural integrity and waterproof sealing while allowing optical access for the camera through the coordinated through hole structure.
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 configuration improves image capture transparency, suppresses air gap creation, and enhances waterproof performance, allowing for a slim and efficient display device with improved luminance and power efficiency.
Implementation Method 1
an Optical Clear Adhesive (OCA) film disposed between the cover glass and the upper polarization plate and attached thereto
Implementation Method 2
Optical Clear Resin (OCR) layer charged in the through hole of the upper polarization plate
Data Source
AI summary
A display device is disclosed. The display device includes a cover glass, a liquid crystal panel disposed below the cover glass and having a transparent portion, an upper polarization plate having a through hole corresponding to the transparent portion and disposed between the cover glass and the liquid crystal panel, an OCA film disposed between the cover glass and the upper polarization plate and attached thereto, and an OCR layer charged in the through hole.