LCD Panel Second Polarizer for Narrow Frame Curing
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Solution Overview
Problem
Existing frame curing methods for liquid crystal display panels are unsuitable for narrow-framed designs with a gate driver in array, as they either require large-sized products or compromise on light transmittance, leading to light leakage issues.
Innovation Solution
A liquid crystal display panel design featuring a second polarizer with a light transmittance of 30-65%, positioned between the color filter substrate and the frame, with its polarization direction perpendicular to the first polarizer, allowing visible light for frame curing while preventing light leakage during normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional frame curing method is used with complete black matrix extending to frame position, then light leakage is prevented, but light transmittance of array substrate must be increased (>30%) which conflicts with gate driver in array design
Solution Approach 1:
The patent removes the black matrix from the frame position area, extracting the light-blocking function only where needed (display area) while leaving the frame area open for UV curing. This allows the frame curing process to proceed without requiring high light transmittance from the array substrate, resolving the conflict between preventing light leakage and enabling frame curing.
Solution Approach 2:
The black matrix is selectively positioned only in the display area where light leakage prevention is needed, rather than extending to the frame position. This local differentiation allows the frame area to have high UV transmittance for curing while the display area maintains light-blocking properties to prevent light leakage during normal operation.
2Ease of manufacture
If black matrix is removed from frame position to enable UV curing, then frame curing can be performed, but light leakage occurs at panel edges during normal display
Solution Approach 1:
The black matrix is extracted from the frame position area and retained only in the display area. This selective removal enables UV light to reach the frame for curing while maintaining light-blocking coverage in the display area to prevent light leakage during normal operation.
Solution Approach 2:
The black matrix coverage is differentiated by location: present in the display area to prevent light leakage, and absent in the frame area to allow UV curing. This spatial differentiation resolves the contradiction between enabling frame curing and preventing light leakage.
3Area of stationary object
If narrow-framed design with gate driver in array is implemented, then device size is reduced, but existing frame curing methods cannot be applied
Solution Approach 1:
By removing the black matrix from the frame position, the patent enables UV curing to reach the frame area directly through the array substrate. This modification makes narrow-framed designs with gate driver in array manufacturable, as the UV curing process can now be applied without requiring large panel sizes or alternative curing methods.
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
Enables effective frame curing for both large and small-sized products, particularly those with a narrow-framed design and a gate driver in array, by preventing light leakage and ensuring display quality.
Implementation Method 1
A second polarizer is arranged between the color filter substrate and the frame, with no black matrix therebetween. A polarization direction of the second polarizer is perpendicular to that of the first polarizer.
Implementation Method 2
a periphery of the LCD layer is provided with a frame for package of liquid crystals
Data Source
AI summary
Related to is the technical field of liquid crystal displays, and in particular to a liquid crystal display panel and a frame curing method. The liquid crystal display panel comprises an array substrate, a color filter substrate, and a liquid crystal layer disposed therebetween, the liquid crystal layer being provided with a frame for package in a periphery thereof, wherein the color filter substrate is provided, on a side thereof away from the liquid crystal layer, with a first polarizer, and a second polarizer is arranged between the color filter substrate and the frame, with no black matrix therebetween.