Liquid Crystal Display Panel Support Posts with Expandable Auxiliary Pads
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Solution Overview
Problem
Liquid crystal display panels suffer from ring-shaped or horizontal black and white banded stripes (Mura) due to uneven thickness caused by support posts being subjected to excessive external forces during vibration or transportation, leading to compression that cannot be fully restored, resulting in non-uniform support and thickness issues.
Innovation Solution
Incorporating expandable auxiliary pads made of cesium-doped lead triiodide perovskite mixed with organic cations into the support posts, which change from a non-expanded to an expanded state when compressed, compensating for the height difference caused by the support post body's inability to restore its original height after external force compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If support posts are made of ultraviolet curable acrylic resin to maintain uniformity of liquid crystal cell thickness, then the support posts can provide initial structural support, but they cannot be restored to their original state after long-term compression from external forces during vibration or transportation, causing height reduction and Mura
Solution Approach 1:
The support post transitions from a static structure to a dynamic one by incorporating an expandable auxiliary pad that can change its state (expanded/non-expanded) in response to compression, allowing the support post to adapt and restore its height after external forces are removed
Solution Approach 2:
The auxiliary pad changes its physical state (from non-expanded to expanded) in response to compression, altering its volume and height parameters to compensate for the compression of the support post body, thereby maintaining overall support post height and preventing Mura
2Force
If the support post body is compressed by excessive external force during vibration or transportation, then the support post absorbs the force, but the support post cannot be restored to its original state, causing height reduction and uneven liquid crystal cell thickness
Solution Approach 1:
The auxiliary pad is pre-positioned within the support post structure to provide compensatory expansion capability before permanent damage can occur, cushioning the effect of excessive compression forces on the overall support post height
Solution Approach 2:
The auxiliary pad converts the harmful effect of compression (which would normally cause permanent height loss) into a beneficial restoration mechanism by expanding after compression to push the support post body back to its original height, thereby eliminating Mura
3Stability of the object's composition
If the auxiliary pad is made of expansive material (cesium-doped lead triiodide perovskite mixed with organic cations) to enable expansion compensation, then the support uniformity is improved, but the device complexity and material composition become more complex
Solution Approach 1:
The support post is constructed as a composite structure combining the support post body (ultraviolet curable acrylic resin) with the auxiliary pad (expansive perovskite material mixed with organic cations), where each material contributes its unique properties to achieve both structural support and compensatory expansion functionality
Solution Approach 2:
The auxiliary pad is nested within or integrated with the support post body structure, allowing the expansion mechanism to be contained within the existing support post geometry without requiring separate external components, thereby minimizing structural complexity
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
The expanded auxiliary pads ensure uniform support and prevent Mura by increasing their thickness to match the original height of the support posts, maintaining panel uniformity and preventing the appearance of banded stripes.
Implementation Method 1
each of the support posts includes a support post body and an expandable auxiliary pad; wherein in a first state, the auxiliary pad is in a non-expanded state, and in a second state, the auxiliary pad is in an expanded state
Data Source
AI summary
The present application provides a liquid crystal display panel and a manufacturing thereof. The liquid crystal display panel includes a first substrate, a second substrate, a liquid crystal layer, and support posts. Each of the support posts includes a support post body and an expandable auxiliary pad. In a first state, the auxiliary pad is in a non-expanded state, and in a second state, the auxiliary pad is in an expanded state. This compensates for a height difference caused by the support post body which cannot be restored after being compressed by an external force and relieves a problem of appearance of Mura in the liquid crystal display panel.