Liquid Crystal Panel Common Line Design for Camera Cutouts
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Solution Overview
Problem
In liquid crystal display devices with integrated cameras, the overlap of metal common lines with seals during bonding hinders proper sealing, leading to light leakage and diffraction patterns in images due to the difficulty in hardening metal lines with ultraviolet rays, and the absence of seals around camera through holes allows light leakage from the display area.
Innovation Solution
A liquid crystal panel design featuring a first common line with a mesh structure and a plate structure between the light-transmitting portion and the display area, where the first common line is formed between the non-display area and the display area, and a second common line is formed outside the display area to overlap with the seal, ensuring proper sealing and preventing light leakage by injecting liquid crystal into the light-transmitting portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal common line is formed to overlap with the seal for applying common voltage, then the common voltage can be applied to the common electrode, but the seal cannot be properly hardened by ultraviolet rays because the metal line blocks the UV transmission
Solution Approach 1:
The common line is divided into two distinct parts: a mesh common line formed of multiple thin lines that allow UV transmission through gaps, and a plate common line that provides solid structural support. This segmentation enables both UV transmission for seal hardening and electrical conductivity for common voltage application.
Solution Approach 2:
The common line structure combines mesh lines (transparent or semi-transparent material) with plate structures (metallic material) to create a composite that simultaneously achieves UV transparency for seal hardening and electrical conductivity for common voltage application.
2Object-affected harmful factors
If the first seal is extended to surround the through hole for the camera, then light leakage can be prevented, but the seal structure becomes more complex and may interfere with the mesh common line structure
Solution Approach 1:
The seal structure is segmented into a first seal surrounding the through hole and a second seal forming a rectangle outside the display area. This segmentation allows the seal to effectively block light leakage paths while maintaining a manageable structure that can accommodate the mesh common line.
Solution Approach 2:
The seal structure is designed with different configurations in different regions: the first seal is extended to surround the through hole where light leakage is most critical, while the second seal forms a rectangular boundary. This local differentiation optimizes light leakage prevention without uniformly increasing complexity throughout the entire seal structure.
3Ease of manufacture
If the mesh common line structure is used to allow UV transmission, then the seal can be hardened, but light leakage may occur through the gaps in the mesh structure
Solution Approach 1:
The mesh common line and plate common line are merged into a unified structure where the mesh lines provide UV transmission capability and the plate lines provide light blocking capability. This combination allows the common line structure itself to serve dual functions: enabling seal hardening while preventing light leakage.
Solution Approach 2:
The common line uses a composite structure combining mesh lines (transparent material for UV transmission) with plate lines (metallic material for light blocking), creating a material composition that simultaneously achieves seal hardening and light leakage prevention.
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 design prevents light leakage and diffraction patterns by ensuring the liquid crystal is injected into the light-transmitting portion, reducing the occurrence of spectrum Mura and improving image quality by matching the refractive index of the liquid crystal with the substrates, thus enhancing the borderless appearance of the display device.
Implementation Method 1
a liquid crystal display device that displays images using optical anisotropy of a liquid crystal
Implementation Method 2
ultraviolet rays irradiate to the seals from the bottom of the lower substrate, whereby the seals are hardened
Implementation Method 3
reducing the occurrence of spectrum Mura and improving image quality by matching the refractive index of the liquid crystal with the substrates
Data Source
AI summary
A liquid crystal panel and a liquid crystal display device using the same are disclosed, in which among common lines formed to overlap a seal formed between a non-display area and a display area, a common line formed between a light-transmitting portion where a through hole is formed and the display area is formed in a plate structure. The liquid crystal panel comprises a first common line formed between a light-transmitting portion of a non-display area of a driving device array substrate and a display area of the driving device array substrate, a second common line formed between a first non-display area of the non-display area and the display area, a seal formed on the second common line to overlap the second common line without overlapping the first common line, and a liquid crystal injected into the display area and the light-transmitting portion.