Special-Shaped Display Panel Shift Register Placement

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Solution Overview

Problem

Laser cutting for irregular display panel shapes can affect the performance of shift registers, leading to abnormal displays and reliability issues due to the sputtering of high-energy laser beams on polycrystalline silicon, which reduces cutting efficiency when energy is lowered.

Innovation Solution

The display panel design includes a non-display area with shift registers positioned outside the laser cutting affected areas, and optionally uses a polycrystalline silicon absorber layer or virtual shift registers in these areas to minimize the impact of laser sputtering, ensuring normal operation and high cutting efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If laser cutting is used to machine regular rectangles into irregular patterns, then the display panel can be configured in various shapes to increase the proportion of the display screen, but the performance of the shift registers may be affected causing abnormal display or reliability problems

Engineering Contradiction:

Improvedisplay panel shapeVSAvoidshift register performance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent extracts the shift registers from the laser cutting affected area by designing a non-display area with a cutout portion that positions the shift registers outside the region subjected to laser sputtering. This separation removes the harmful laser exposure from the sensitive shift register components while maintaining the irregular display panel shape.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a non-display area with a cutout portion as an intermediary structure between the display area and the laser cutting path. This intermediary zone acts as a buffer that protects the shift registers from direct laser exposure while allowing the laser to effectively cut the display panel into irregular shapes.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If laser cutting energy is increased to maintain cutting efficiency, then the cutting process is faster, but the sputtering effect on polycrystalline silicon intensifies affecting shift register performance

Engineering Contradiction:

Improvelaser cutting efficiencyVSAvoidlaser sputtering effect

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the shift registers from the laser cutting affected area by positioning them in a non-display area with a cutout portion that excludes them from the region subjected to laser sputtering. This allows high-energy laser cutting to proceed efficiently without compromising shift register performance.

Inventive Principle:

Principle #2Taking out (Extraction)

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 prevents laser sputtering from affecting shift registers, ensuring reliable and efficient display performance while maintaining high laser cutting efficiency by avoiding shift registers in affected areas and using absorber layers to mitigate energy impact.

Implementation Method 1

polycrystalline silicon absorber layer or virtual shift registers in these areas to minimize the impact of laser sputtering

Methodology Applied

Scientific EffectLaser absorption: Absorption (EM radiation)

Implementation Method 2

laser cutting affected area where the plurality of shift registers are not disposed in at least part of the laser cutting affected area

Methodology Applied

Scientific EffectLaser ablation: Laser Ablation

Data Source

PatentUS11574572B2Display panel having special-shaped area and display device

Publication Date: 2023.02.07 XIAMEN TIANMA MICRO ELECTRONICS

AI summary

Provided are a display panel and a display device. The display panel includes a display area and a non-display area surrounding the display area, the display area includes a first rectangular area and a first special-shaped area disposed adjacent to the first rectangular area, and the non-display area includes a second rectangular area adjacent to the first rectangular area and a second special-shaped area adjacent to the first special-shaped area. The display area includes pixel units arranged in an array, and a plurality of shift registers are disposed in the second rectangular area and the second special-shaped area, where each of the plurality of shift registers is connected to a row of pixel units. The second special-shaped area includes a laser cutting affected area, where none of the plurality of shift registers is disposed in at least part of the laser cutting affected area.