Display Device Light Shielding Parts Reduce Reflections
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Solution Overview
Problem
Existing display devices with a color-filter-on-array (COA) structure face issues with light reflection from metal electrodes, which affects image quality due to incomplete light shielding, particularly around video signal lines and switching elements.
Innovation Solution
The implementation of a display device with a first and second substrate configuration, where the first substrate includes a switching element, a scanning line, video signal line, and filter films with light shielding parts positioned to overlap these components, and the second substrate has additional light shielding parts to reduce reflections from metal electrodes and enhance image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a light shielding film is formed to integrally cover video signal lines and switching elements, then light shielding for these components is improved, but light reflection from metal electrodes in contact holes remains unaddressed
Solution Approach 1:
The light shielding function is divided into multiple segments: a first light shielding film covering video signal lines and switching elements, and a second light shielding film specifically covering metal electrodes in contact holes. This segmentation allows each shielding layer to target specific light reflection sources independently, improving overall shielding effectiveness without creating a single complex integrated structure.
Solution Approach 2:
The patent introduces a vertical layering dimension by stacking multiple light shielding films at different positions within the display structure. The first light shielding film is positioned at one layer while the second light shielding film is positioned at another layer, creating a multi-dimensional shielding approach that addresses light reflection from different components without increasing horizontal complexity.
2Object-affected harmful factors
If multiple light shielding parts are added to cover metal electrodes, then light reflection is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent merges the light shielding function with existing structural components. The first and second light shielding films are integrated into the display device's existing layer structure, combining light shielding functionality with the overall device architecture rather than adding separate standalone shielding components, thereby simplifying the manufacturing process.
Solution Approach 2:
The light shielding films serve multiple functions: they shield light from video signal lines, switching elements, and metal electrodes simultaneously. This multi-functionality reduces the need for separate dedicated shielding structures for each component, simplifying the overall manufacturing process while maintaining comprehensive light shielding coverage.
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 configuration effectively reduces light reflections and improves image quality by ensuring comprehensive light shielding, minimizing color mixture and increasing the resolution and accuracy of the display device.
Implementation Method 1
a filter film including a first filter film and a second filter film that has a visible-light wavelength distribution different from that of the first filter film
Implementation Method 2
a first light shielding part provided between the filter film and the first electrode; and a second light shielding part provided on the second substrate
Data Source
AI summary
A display device includes a first light shielding part provided between a filter film and a first electrode, and a second light shielding part provided on a second substrate. First and second filter films each have long sides that extend in a first direction in which a video signal line extends, and the first and the second filter films are arranged adjacent to each other in a second direction different from the first direction. The first light shielding part overlaps the video signal line in a plan view. The second light shielding part overlaps a metal electrode in the plan view.