Camera Hole Segmentation in Display Device Polarizers
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Solution Overview
Problem
The challenge lies in creating a display device with a camera hole that maintains structural rigidity, prevents thermal deformation, and minimizes defects such as bending deformation and light path distortion, while also increasing camera resolution and visible light transmittance.
Innovation Solution
The display device incorporates a camera hole that passes through the backlight unit and lower polarizer, with an interference prevention hole in the upper polarizer, and employs a deformation prevention structure like micro-holes or fixed protrusions to prevent air bubbles and bending, ensuring the polarizers do not cover the camera lens, and uses vacuum bonding to enhance the appearance quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a camera hole is drilled through the liquid crystal panel substrates, then the camera resolution is improved, but the structural rigidity is reduced and thermal deformation occurs
Solution Approach 1:
The patent divides the camera hole formation into two segments: the first substrate contains a first through-hole and the second substrate contains a second through-hole, with the liquid crystal layer bridging them. This segmentation allows the hole to pass through the panel while distributing structural stress, maintaining rigidity while enabling camera functionality.
Solution Approach 2:
The liquid crystal layer acts as an intermediary material filling the gap between the two substrates. This intermediary not only optically connects the substrates but also provides structural support to maintain rigidity while allowing the camera hole to pass through the panel.
2Measurement precision
If a camera hole is formed in the liquid crystal panel, then the camera resolution is improved, but manufacturing complexity and processing cost increase
Solution Approach 1:
By segmenting the hole formation across two separate substrates rather than drilling a single complex hole through the entire panel, the manufacturing process becomes simpler. Each substrate can be processed independently with standard through-hole techniques, reducing overall manufacturing complexity.
3Ease of operation
If a camera hole is drilled through the panel, then the camera functionality is enabled, but thermal deformation due to laser heating occurs
Solution Approach 1:
Segmenting the hole into two separate through-holes in different substrates reduces the concentration of thermal stress in any single location. The liquid crystal layer acts as a thermal buffer between the substrates, reducing thermal deformation while maintaining camera functionality.
4Stability of the object's composition
If the polarizers cover the camera lens, then the display structure is maintained, but the camera resolution is reduced
Solution Approach 1:
The patent segments the polarizer coverage by positioning the first polarizer in the first substrate and the second polarizer in the second substrate, with the liquid crystal layer in between. This segmentation allows the camera hole to pass through without being blocked by continuous polarizer material, maintaining both display structure and camera resolution.
Data Source
AI summary
A display device comprises: a backlight unit; a liquid crystal panel comprising a lower polarizer, an upper polarizer, and a first substrate and a second substrate; and a cover plate on the liquid crystal panel, wherein a camera hole passes through the backlight unit and up to the lower polarizer, an interference prevention hole is located at a position corresponding to the camera hole, and the camera hole is not in the first substrate and the second substrate. The display device has a hole with a uniform size, decreased processing cost, increased structural rigidity, and does not have thermal deformation, can prevent defects such as generation of air bubbles, bending deformation, and distortion of a light path due to the hole and the vacuum bonding while increasing the visible light transmittance and resolution of the camera, and improving the appearance quality of the display device.