Black Matrix Slot Pattern for Charge Isolation in Display Modules
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Solution Overview
Problem
The existing dual cell local dimming technology in display apparatuses experiences issues with edge bright lines and light leakage due to charge conduction from the black matrix layer to the dimming area, leading to abnormal liquid crystal molecule deflection and display defects when the module is turned off.
Innovation Solution
Incorporating a slot pattern in the black matrix layer of the light control panel, which creates an isolation zone between the common electrode line and the dimming area, preventing charge conduction and thereby addressing the edge bright line issue by ensuring proper electric field control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a continuous black matrix layer is used to control light, then light leakage is reduced, but charge conduction to the dimming area occurs causing edge bright lines
Solution Approach 1:
The black matrix layer is segmented by introducing slots that divide the continuous layer into isolated regions. These slots prevent charge conduction pathways while maintaining the light-blocking function of the black matrix, thereby eliminating edge bright lines without increasing light leakage.
Solution Approach 2:
The slots act as intermediary elements between the common electrode line and the dimming area. By introducing these intermediate regions, charge conduction is blocked while the black matrix layer continues to perform its light-blocking function, resolving the contradiction between preventing light leakage and preventing charge conduction.
2Stability of the object's composition
If the black matrix layer is placed close to the common electrode line to improve electric field control, then display uniformity improves, but charge conduction to the dimming area increases
Solution Approach 1:
The black matrix layer is divided by slots into separate regions, creating electrical isolation between the common electrode line area and the dimming area. This segmentation maintains close proximity for electric field control while preventing charge conduction pathways, thus preserving both display uniformity and charge isolation reliability.
3Reliability
If the slot in the black matrix layer is positioned to overlap the signal transmission line, then charge conduction is prevented, but manufacturing precision requirements increase
Solution Approach 1:
The slot is positioned specifically in the peripheral area where the black matrix layer exists, creating a localized isolation zone. By concentrating the isolation function in this specific region rather than requiring precise positioning across the entire display area, the manufacturing precision requirement is reduced while maintaining effective charge isolation.
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 solution effectively prevents charge conduction to the dimming area, eliminating edge bright lines and ensuring stable display performance by maintaining the electric field integrity, thus enhancing the display module's reliability and image quality.
Implementation Method 1
a first black matrix layer, which is on a side of the second base substrate close to the first liquid crystal layer and is in the dimming area and the peripheral area
Implementation Method 2
the first black matrix layer is provided with a slot in the peripheral area... preventing charge conduction
Implementation Method 3
a first liquid crystal layer between the first substrate and the second substrate... abnormal liquid crystal molecule deflection
Data Source
AI summary
A light control panel, having a dimming area and a peripheral area surrounding the dimming area; wherein the light control panel includes a first substrate and a second substrate oppositely disposed, and a first liquid crystal layer therebetween; the first substrate includes a signal connecting line on the first base substrate; the signal connecting line includes a first signal sub-line and a second signal sub-line which are electrically connected together and in different layers; a connecting position between the first signal sub-line and the second signal sub-line is in the peripheral area; and the slot at a position corresponding to the connecting position between the first signal sub-line and the second signal sub-line is formed with a protrusion, and an orthographic projection of the slot on the first base substrate overlaps an orthographic projection of the first signal sub-line on the first base substrate.