Light-Shielding Conductive Pattern Layer for Display Panel
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Solution Overview
Problem
Conventional display devices experience display errors due to long-term exposure to strong outdoor ambient light, such as sunlight, which affects their reliability and functionality.
Innovation Solution
A display panel design that includes a first substrate, a second substrate, a display medium layer, and a light-shielding conductive pattern layer, where the light-shielding conductive pattern layer, comprising a patterned light-shielding conductive layer and a patterned low-reflection layer, is positioned between the display medium layer and the second substrate to shield light emitted by the backlight module and prevent reflection of ambient light, thereby protecting active elements from direct irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional display devices are used without additional light-shielding structures, then the device structure remains simple, but the display reliability deteriorates under strong outdoor ambient light
Solution Approach 1:
The patent combines the light-shielding function and conductive function into a single integrated layer. The light-shielding conductive pattern layer simultaneously blocks ambient light and provides electrical connectivity, eliminating the need for separate light-shielding layers and conductive layers, thus improving reliability without proportionally increasing structural complexity
Solution Approach 2:
The light-shielding conductive pattern layer performs multiple functions: it acts as a light-shielding layer to block ambient light, a conductive layer to provide electrical pathways, and a patterned structure to maintain display visibility. This multi-functional design addresses the reliability issue while managing structural complexity
2Object-affected harmful factors
If the light-shielding conductive pattern layer is added to protect active elements, then the protection effectiveness improves, but the manufacturing complexity increases
Solution Approach 1:
The light-shielding conductive pattern layer is implemented as a patterned structure rather than a continuous layer. This segmentation allows light to pass through non-patterned areas for display functionality while providing protection in patterned areas where active elements are located, achieving effective protection while maintaining manufacturability through standard photolithography processes
Solution Approach 2:
The light-shielding conductive pattern layer is formed during the manufacturing process before the display device is assembled and deployed. This preliminary formation ensures that the protective structure is already in place to prevent light-induced damage from the outset, avoiding the need for additional post-assembly modifications
3Reliability
If the light-shielding conductive pattern layer overlaps active elements, then the shielding effectiveness improves, but the manufacturing precision requirements increase
Solution Approach 1:
The light-shielding conductive pattern layer is applied locally only in areas where active elements are located, rather than covering the entire display area. This localized application provides targeted protection where it is most needed while reducing the overall manufacturing precision requirements, as the pattern can be aligned with the known positions of active elements using standard registration techniques
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 enables the display device to maintain favorable reliability and functionality for extended use under strong outdoor ambient light conditions by effectively shielding light and preventing reflection, thus protecting the active elements and ensuring clear visibility of displayed images.
Implementation Method 1
the light-shielding conductive pattern layer may shield the light emitted by the backlight module and may prevent the reflection of the strong ambient light
Implementation Method 2
the first patterned light-shielding conductive layer is disposed between the first patterned low-reflection layer and the second substrate
Data Source
AI summary
A display panel includes a first substrate, a second substrate, a display medium layer, pixel units, and a light-shielding conductive pattern layer. The first substrate has a first inner surface and a first outer surface, and the first outer surface serves as a display surface of the display panel. The second substrate is disposed opposite to the first substrate and has a second inner surface and a second outer surface. The display medium layer is disposed between the first inner surface and the second inner surface. The pixel units are disposed between the display medium layer and the first inner surface, and at least one of the pixel units includes an active element. The light-shielding conductive pattern layer is disposed between the display medium layer and the second inner surface, at least partially overlaps the active element in a vertical projection direction, and includes a first patterned light-shielding conductive layer and a first patterned low-reflection layer. The first patterned light-shielding conductive layer is disposed between the first patterned low-reflection layer and the second substrate.