LCD Barrier Pattern for Narrow Bezel and Outgas Control
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Solution Overview
Problem
As LCDs increase in size and resolution, the amount of wiring required for precise control grows, leading to a larger non-display area and making it difficult to achieve a narrow-bezel display, while also posing a challenge in preventing outgases from infiltrating the display area during the cutting process.
Innovation Solution
The implementation of a liquid crystal display (LCD) design that includes a first substrate with defined display and non-display areas, a barrier pattern on the insulating layer in the non-display area, and a seal pattern that overlaps the barrier pattern, along with a second substrate, where the barrier pattern is strategically positioned to prevent outgases from entering the display area during the cutting process using a laser cutting method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the amount of wiring is increased to achieve precise control of high-resolution LCD, then the control precision is improved, but the non-display area becomes larger
Solution Approach 1:
The patent moves control circuits from the planar substrate surface to the side surface of the substrate through 3D vertical structures. The insulating layer and electrode patterns are formed vertically along the side surface, transforming a 2D wiring problem into a 3D spatial solution that preserves display area while enabling precise control.
Solution Approach 2:
The patent embeds multiple functional layers within each other in the vertical direction. The insulating layer contains electrode patterns, which are further nested with conductive layers and sealing structures, creating a compact vertical integration that reduces horizontal space requirements for control wiring.
2Area of stationary object
If the non-display area is reduced to achieve narrow bezel, then the appearance is improved, but outgases can infiltrate into the display area during cutting process
Solution Approach 1:
The patent forms a sealing structure along the side surface before the cutting process. The insulating layer and electrode patterns create a preliminary barrier that prevents outgases generated during laser cutting from infiltrating into the display area, addressing the contamination problem before it occurs.
Solution Approach 2:
The insulating layer acts as an intermediary barrier between the cutting zone and the display area. It blocks the path of outgases while still allowing the cutting process to proceed, mediating between the manufacturing process and the display quality requirements.
3Productivity
If laser cutting is used to reduce non-display area, then the productivity is improved, but outgases are generated that may infiltrate display area
Solution Approach 1:
The patent converts the harmful outgases generated by laser cutting into a controlled process by using the sealing structure to contain and redirect them. The same laser cutting process that generates contamination is also used to create precise sealing edges that prevent that contamination from reaching the display area.
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 effectively reduces the non-display area, allowing for a narrower bezel and prevents outgases from infiltrating the display area, thereby enhancing the performance and appearance of the LCD.
Implementation Method 1
cutting the first substrate and the second substrate by irradiating laser along the seal pattern of the first substrate
Data Source
AI summary
A liquid crystal display includes: a first substrate on which a display area and a non-display area disposed on an outside of the display area are defined; a first insulating layer, which is disposed in the non-display area on the first substrate; a barrier pattern, which is disposed on the first insulating layer; a seal pattern, which is disposed on the barrier pattern to overlap the barrier pattern; and a second substrate, which is disposed to face the first substrate.