Vacuum-Bonded Display Panel with Frame Sealant for Uniform Spacing
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Solution Overview
Problem
Conventional liquid crystal display devices face issues with poor screen contrast, dark-state light leakage, and defects such as stripes, rainbow patterns, or color casts due to non-uniform adhesive layers, which also increase power consumption and panel thickness.
Innovation Solution
A display panel design featuring a dimming liquid crystal panel and a display liquid crystal panel separated by a frame-shaped sealant with support units, where the sealant is positioned outside the effective display area to maintain uniform thickness and surface flatness, and the support units are integrated within light shielding matrices to prevent panel bending and ensure uniform spacing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If an adhesive layer is used to bond the dimming liquid crystal panel and display liquid crystal panel, then the panels are joined together, but the adhesive layer causes non-uniform thickness, surface flatness issues, and defects such as stripes and rainbow patterns
Solution Approach 1:
The patent removes the adhesive layer entirely from the bonding interface between panels. Instead, it uses a vacuum adhesive force generation structure that creates negative pressure between the dimming liquid crystal panel and display liquid crystal panel, eliminating the need for adhesive materials that cause thickness non-uniformity and surface defects.
Solution Approach 2:
The patent replaces the chemical bonding mechanism (adhesive) with a physical mechanism (vacuum pressure). By generating negative pressure through a vacuum pump connected to the sealed cavity, the panels are bonded together through atmospheric pressure differential, avoiding all issues associated with adhesive layers.
2Manufacturing precision
If a vacuum cavity is created between the panels, then display quality is improved by eliminating defects, but the structural complexity increases
Solution Approach 1:
The patent integrates the vacuum generation function into the existing sealing structure. The sealant structure serves dual purposes: it seals the liquid crystal cells and simultaneously creates the vacuum cavity. The vacuum pump connects to this sealed cavity, combining multiple functions into a unified structure that reduces overall system complexity.
Solution Approach 2:
The sealant structure performs multiple functions: it bonds the panels together, seals the liquid crystal cells, creates the vacuum cavity, and provides structural support. This multi-functional design eliminates the need for separate adhesive layers and vacuum sealing structures, reducing overall device complexity while achieving the desired surface flatness.
3Manufacturing precision
If the sealant is positioned outside the effective display area, then display quality is maintained, but the panel thickness increases
Solution Approach 1:
The patent transitions from using adhesive layers in the vertical dimension (between panels) to using a vacuum pressure field that acts across the sealed cavity. This allows the bonding function to be achieved without adding vertical thickness from adhesive materials, as the vacuum pressure acts through the sealed volume rather than requiring material presence.
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 enhances display quality by reducing defects, lowering power consumption, and minimizing panel thickness and weight, while maintaining high light transmittance and mechanical strength.
Implementation Method 1
one side of the sealant close to the dimming liquid crystal panel is adhered to the dimming liquid crystal panel, and one side of the sealant close to the display liquid crystal panel is adhered to the display liquid crystal panel
Implementation Method 2
a box-shaped cavity enclosed by the sealant, the dimming liquid crystal panel, and the display liquid crystal panel is a vacuum cavity
Data Source
AI summary
The present disclosure provides a display panel and a manufacturing method of the display panel. The display panel includes: a display liquid crystal panel including a plurality of sub-pixels arranged in an array; a dimming liquid crystal panel located on a light incident side of the display liquid crystal panel and including a plurality of dimming pixels arranged in an array; and a sealant in a frame shape located between the dimming liquid crystal panel and the display liquid crystal panel, a surface of the sealant close to the dimming liquid crystal panel being adhered to the dimming liquid crystal panel, and a surface of the sealant close to the display liquid crystal panel being adhered to the display liquid crystal panel.