Display Panel Vertical Light Shielding Parts
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Solution Overview
Problem
In display panels, the non-display areas between sub-pixels experience light leakage due to fringe field effects and lack of black matrix shielding, leading to increased L0 brightness and reduced contrast.
Innovation Solution
Incorporating gate line light shielding parts in horizontal non-display areas and vertical light shielding parts in vertical non-display areas to prevent light leakage, with specific dimensions and arrangements to optimize light blocking and prevent displacement-induced leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If vertical light shielding parts are added to prevent light leakage at junctions, then light leakage is reduced and contrast is improved, but device complexity increases
Solution Approach 1:
The light shielding function is segmented into horizontal gate line light shielding parts and vertical light shielding parts, with each segment addressing specific light leakage directions. The vertical light shielding parts are further segmented into multiple segments along the gate line direction, allowing targeted shielding at junction areas while maintaining gaps to prevent fringe field effects.
Solution Approach 2:
Vertical light shielding parts are selectively placed only in vertical non-display areas where light leakage occurs at junctions, rather than uniformly across the entire display. The width of vertical light shielding parts is locally adjusted based on position, with wider parts at signal line locations and narrower parts elsewhere, optimizing shielding effectiveness while minimizing complexity.
2Object-affected harmful factors
If vertical light shielding parts are made wider to improve light blocking, then light leakage prevention is enhanced, but fringe field effects increase causing brightness increase
Solution Approach 1:
The vertical light shielding parts are designed with partial width coverage rather than full width, creating intentional gaps between adjacent vertical light shielding parts and gate line light shielding parts. This partial action provides sufficient light blocking at junctions while avoiding excessive width that would cause fringe field effects and brightness increase.
Solution Approach 2:
Gaps are pre-designed between vertical light shielding parts and gate line light shielding parts to prevent fringe field effects before they can occur. This preliminary structural arrangement ensures that voltage jumps do not create unwanted liquid crystal deflection and brightness increase, while still maintaining effective light shielding where needed.
3Object-affected harmful factors
If gaps are reduced between vertical light shielding part and gate line light shielding parts to prevent displacement, then light leakage prevention is improved, but manufacturing precision requirements increase
Solution Approach 1:
The gap size is set to a partial value (less than or equal to 20 micrometers) that is sufficient to prevent displacement-induced light leakage but does not require extremely tight manufacturing tolerances. This partial gap provides a buffer zone that accommodates normal manufacturing variations while still preventing light leakage.
Solution Approach 2:
The vertical light shielding parts are designed to be self-positioning relative to gate line light shielding parts through the gap structure. The gap provides natural alignment tolerance, allowing the parts to maintain proper relative positioning without requiring high-precision active control during manufacturing and assembly.
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
Reduces L0 brightness by 19% and increases contrast by 17% without adding complexity or negative quality influences, effectively addressing light leakage issues.
Implementation Method 1
a vertical light shielding part, and the vertical light shielding part is configured to prevent two sub-pixels on two sides, in the row direction, of the vertical light shielding part from light leakage at a junction
Implementation Method 2
gate line light shielding parts extending in a row direction are arranged on horizontal non-display areas between every two adjacent rows of sub-pixels
Implementation Method 3
the area (the non-display area between every two adjacent sub-pixels) has a metal circuit (such as: H Gate/V gate/SDN com), and voltage jump to form a fringe field effect, resulting in deflection of the liquid crystal molecules
Data Source
AI summary
A display panel and a display device are disclosed. The display panel includes a plurality of sub-pixels arranged in an array; gate line light shielding parts extending in a row direction are arranged on horizontal non-display areas between every two adjacent rows of sub-pixels; vertical non-display areas are arranged between every two sub-pixels adjacent in a row direction; at least one of the vertical non-display areas is provided with a vertical light shielding part, and the vertical light shielding part is configured to prevent two sub-pixels on two sides, in the row direction, of the vertical light shielding part from light leakage at a junction; and a gap is formed between the vertical light shielding part and each of two gate line light shielding parts adjacent to the vertical light shielding part.