Micro LED Display Substrate with Integrated Touch Electrodes

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Solution Overview

Problem

Micro light-emitting diode display panels integrated with touch panels result in relatively thick devices due to the need for an external touch panel, which increases thickness and reduces flexibility.

Innovation Solution

A display substrate design that incorporates micro LEDs with touch electrodes disposed on the side distal from the base substrate, eliminating the need for an external touch panel by integrating touch functionality within the substrate, thereby reducing thickness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an external touch panel is integrated with micro LED display panels, then touch functionality is achieved, but device thickness increases

Engineering Contradiction:

Improvetouch functionalityVSAvoiddevice thickness

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The patent merges the touch panel and display panel into a single integrated structure where the touch electrodes are formed on the same substrate as the micro LEDs. This combining of previously separate components (external touch panel and display panel) into one unified structure achieves touch functionality while eliminating the additional thickness that would result from stacking separate panels.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The substrate serves multiple functions simultaneously: it acts as both the foundation for the micro LED display structure and the base for forming the touch electrodes. This multi-functionality allows the same structural element to provide both display and touch capabilities, avoiding the need for separate dedicated layers for each function and thereby reducing overall device thickness.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If an external touch panel is added to micro LED display panels, then touch capability is provided, but flexibility is reduced

Engineering Contradiction:

Improvetouch capabilityVSAvoiddevice flexibility

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

By merging the touch electrode formation process with the display panel manufacturing process on the same substrate, the patent reduces device complexity. The integrated structure eliminates the need for separate assembly of external touch panels, reducing the number of components and interconnections required, thereby maintaining flexibility while providing touch capability.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS11600748B2Display substrate and manufacturing method t'hereof, display panel and display device

Publication Date: 2023.03.07 BOE TECHNOLOGY GROUP CO LTD

AI summary

Provided is a display substrate including: a base substrate, a plurality of micro light-emitting diodes and a plurality of touch electrodes; wherein the micro light-emitting diode comprises: a first electrode, a light-emitting layer, and a second electrode that are sequentially arranged in a direction distal from the base substrate; and the touch electrode is disposed on a side of the micro LED distal from the base substrate. A manufacturing method of manufacturing a display substrate, a display panel, and a display device are also provided.