Double Sided AMOLED Display Spacer Gap Design

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Solution Overview

Problem

Conventional double-sided displays using OLEDs are prone to direct touch and damage due to substrate deformation, leading to scratches and current leakage, which degrades image quality and reduces operational lifetime.

Innovation Solution

The use of spacers on both substrates, with heights greater than the OLED thickness, positioned to align and prevent direct contact between OLEDs, ensuring a gap even under deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If two OLEDs are disposed on substrates of double sided display, then dual-panel function is achieved with lightweight and small size, but the OLEDs may direct touch each other when substrates are deformed, causing scratches and current leakage

Engineering Contradiction:

Improvedual-panel functionVSAvoidOLED protection from direct touch

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

A gel layer is introduced as an intermediary substance between the first OLED and the second OLED. This gel layer fills the space between the two OLEDs and prevents them from directly touching each other when the substrates deform under external forces or self-weight, thereby eliminating scratches and current leakage while maintaining the dual-panel display function

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The gel layer is applied beforehand between the OLEDs to provide cushioning and protection. By pre-positioning this protective layer, the design anticipates potential substrate deformation and ensures the OLEDs are protected from direct contact before any damage can occur

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS7710030B2Double sided AMOLED display and fabricating method thereof

Publication Date: 2010.05.04 AU OPTRONICS CORP

AI summary

A double sided display comprises a first substrate, a first organic light-emitting device (OLED) disposed on the first substrate, a first spacer, a second substrate, a second OLED disposed on the second substrate and a second spacer. The first and second spacers are disposed on the first and second substrates, and close to the first and second OLEDs, respectively. A height of the first spacer is larger than a thickness of the first OLED. A height of the second spacer is larger than a thickness of the second OLED. During assembly, the first substrate is disposed opposite to the second substrate, and the first spacer is disposed opposite to the second spacer. Also, the exact positions of the first and second spacers are determined for preventing the direct touch between the first and second OLEDs while the double sided display is deformed.