Display Panel Black Shielding Layer for Borderless Appearance
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Solution Overview
Problem
Existing four-sided borderless display devices suffer from chromatic aberration, uneven light-exiting surfaces, and poor appearance due to filling materials used between color filter and array substrates.
Innovation Solution
A display panel design featuring a first substrate with metal wiring in the non-display area and a black shielding layer covering the wiring, positioned away from the second substrate, to improve the appearance and flatness of the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If filling material is added to gap between color filter substrate and array substrate, then four-sided borderless display device is achieved, but chromatic aberration occurs between filled area and non-filled area
Solution Approach 1:
The patent removes the filling material from the gap between substrates and instead uses a black shielding layer patterned to cover only the metal wiring areas. This extraction of the filling material eliminates the chromatic aberration problem while maintaining the four-sided borderless display structure through precise optical compensation and shielding design.
Solution Approach 2:
The black shielding layer is selectively positioned only in regions where metal wiring is present, rather than uniformly filling the entire gap. This local quality approach ensures that chromatic aberration is suppressed only where necessary (at wiring locations) while preserving display quality in other areas, achieving borderless display without unwanted side effects.
2Shape
If filling material is added to gap between color filter substrate and array substrate, then four-sided borderless display device is achieved, but uneven light-exiting surface occurs
Solution Approach 1:
The filling material is removed and replaced with a patterned black shielding layer that does not interfere with light extraction. This extraction eliminates the cause of uneven light-exiting surfaces while maintaining the structural integrity needed for four-sided borderless display through alternative support and alignment mechanisms.
Solution Approach 2:
The black shielding layer is applied locally only where metal wiring exists, avoiding interference with the overall light extraction uniformity of the display panel. This selective application prevents the light-exiting surface unevenness that would result from uniform filling material application.
3Shape
If filling material is added to gap between color filter substrate and array substrate, then four-sided borderless display device is achieved, but poor appearance of display device occurs
Solution Approach 1:
The patent uses a black shielding layer to mask the metal wiring in the non-display area, changing the visual appearance from metallic reflections to a uniform black color that matches the display bezel. This color change improves the overall appearance quality while maintaining the four-sided borderless structure.
Solution Approach 2:
The black shielding layer is selectively positioned to cover only the metal wiring areas visible from the front, improving appearance locally where needed without affecting the overall display structure or requiring uniform filling across the entire panel.
Data Source
AI summary
The present application discloses a display panel, a display module, and a display device. The display panel includes a first substrate and a second substrate disposed opposite to each other, and the first substrate includes a metal wiring located in a non-display area; wherein the first substrate includes a black shielding layer, and by providing the black shielding layer in the display panel, wherein the black shielding layer covers the metal wiring in an orthographic projection direction of the first substrate, appearance effect of the display panel is thereby improved.