Indication device

The display device design addresses high wiring resistance and manufacturing inefficiencies by using a specific electrode and planarization layer configuration, reducing costs and defects, and enabling efficient defect detection.

JP2026056583APending Publication Date: 2026-04-01LG DISPLAY CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2025-08-29
Publication Date
2026-04-01

AI Technical Summary

Technical Problem

Existing display devices face challenges such as high wiring resistance, defects due to oxidation of reflective and pad electrodes, connectivity issues, and the need for multiple masks in the manufacturing process, which increase costs and time.

Method used

A display device design with a specific configuration of reflective electrodes, connecting electrodes, and planarization layers that minimize wiring resistance and connectivity defects, allowing for reduced mask usage and easier defect detection in light-emitting elements.

Benefits of technology

The solution reduces wiring resistance, minimizes defects, and enables efficient manufacturing with lower costs and time, while allowing for easy detection of defects in light-emitting elements without relying on driving transistors.

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Abstract

This allows for testing the illumination of the light-emitting element without using a drive transistor, and reduces the resistance between the power supply wiring and the third connecting electrode. [Solution] Each of the multiple subpixels includes a substrate, a drive transistor disposed on the substrate, power wiring disposed on the substrate, a reflective electrode including a first reflective electrode disposed spaced apart from each other on the drive transistor and power wiring and electrically connected to the drive transistor, and a second reflective electrode electrically connected to the power wiring, an adhesive layer disposed on the reflective electrode, a light-emitting element disposed on the adhesive layer, a first planarization layer disposed on the adhesive layer and arranged to surround a part of the side surface of the light-emitting element, a first connecting electrode and a second connecting electrode disposed on the first planarization layer and spaced apart from each other, a second planarization layer disposed on the first planarization layer, the first connecting electrode and the second connecting electrode, and a third connecting electrode disposed on the second planarization layer, wherein the second reflective electrode is connected to the light-emitting element through the second connecting electrode and the third connecting electrode.
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