OLED Display Embedded Microphone Substrate Integration
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Solution Overview
Problem
Conventional organic light emitting display (OLED) devices require additional space for microphones, which increases the size of the non-display region and can potentially reduce the lifespan of the organic light emitting element due to the need for an additional hole through the substrates.
Innovation Solution
An organic light emitting display device with a microphone embedded in the display region, where the microphone is integrated between the substrates without penetrating the substrates that encapsulate the organic light emitting element, using a configuration that includes a piezoelectric layer and electrodes on a substrate with a protection layer and a hole defined through the substrate, allowing for reduced non-display region size and enhanced element protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an additional space is provided in the OLED device to receive the microphone, then the microphone can be accommodated, but the size of the non-display region increases
Solution Approach 1:
The patent merges the microphone with the existing substrate structure by forming the microphone on the same substrate that contains the display region. The substrate serves dual purposes: as the base for the display and as the mounting platform for the microphone, eliminating the need for separate additional space.
Solution Approach 2:
The patent utilizes the vertical dimension by defining a hole through the substrate and positioning the microphone components (electrodes, piezoelectric layer) in three-dimensional space within and on the substrate. This allows the microphone to be integrated without increasing the planar footprint of the non-display region.
2Ease of manufacture
If a hole is defined through the substrates to accommodate the microphone, then the microphone can be installed, but the lifespan of the organic light emitting element may be reduced
Solution Approach 1:
The patent applies local quality by providing a protection layer specifically at the location where the hole is defined through the substrate. This protection layer is localized to the microphone area rather than covering the entire substrate, allowing the hole to be formed for microphone installation while protecting the organic light emitting element from potential damage at the critical penetration point.
Solution Approach 2:
The protection layer is formed beforehand on the substrate before the hole is defined and the microphone is installed. This pre-established protective barrier cushions and protects the organic light emitting element from potential damage during the hole formation process and throughout the device's operation, thereby extending the element's lifespan.
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
The embedded microphone design eliminates the need for additional space in the non-display region, reducing the device's size and potentially increasing the lifespan of the organic light emitting element by preventing damage from the hole penetration.
Implementation Method 1
the microphone may include a first electrode, a piezoelectric layer and a second electrode, which are disposed on a surface of the third substrate
Data Source
AI summary
An organic light emitting display device and a method of manufacturing an organic light emitting display device are disclosed. The organic light emitting display device includes a first substrate, on which a display region and a non-display region surrounding the display region are defined, a second substrate disposed opposite to the first substrate, an organic light emitting element disposed in the display region between the first substrate and the second substrate, a third substrate disposed opposite to the second substrate, and a microphone disposed between the second substrate and the third substrate.