Secondary LED Display Assembly With Isolated ESD Protection
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Solution Overview
Problem
Gaming machines with secondary display assemblies face challenges in providing effective electrostatic discharge (ESD) protection, especially with newer display technologies like OLED, mini-LED, and micro-LED, which are susceptible to external ESD due to reduced physical barriers and air gaps, leading to image quality degradation and increased maintenance needs.
Innovation Solution
A secondary display assembly with a light-emitting diode (LED) configuration that includes a display substrate, an insulation layer, and an electrostatic discharge (ESD) layer electrically isolated by the insulation layer, guiding ESD away from the LEDs, while maintaining image quality and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical barriers and air gaps are used to protect LEDs from ESD, then ESD protection is improved, but image quality deteriorates due to dust ingress and light blockage
Solution Approach 1:
The protective structure is segmented into multiple functional layers: a first protective layer (physical barrier) and a second protective layer (ESD protection layer), each performing a specific function. This segmentation allows the physical barrier to protect against particulate ingress while the ESD layer handles electrostatic discharge, resolving the contradiction by separating protection functions.
Solution Approach 2:
The first protective layer acts as an intermediary between the external environment and the LEDs, providing physical protection while allowing light transmission. The ESD protection layer then provides additional protection against electrostatic discharge without requiring direct contact with the LEDs, mediated through the insulating first protective layer.
2Reliability
If air gaps are used for ESD protection, then ESD protection is improved, but maintenance requirements increase due to dust accumulation
Solution Approach 1:
The first protective layer is designed as a disposable or easily replaceable component that can be cleaned or replaced when contaminated with dust, while the ESD protection layer and LEDs remain protected. This allows maintenance of the protective function without complex repairs to the entire display assembly.
Solution Approach 2:
The protective layers are pre-installed during manufacturing to provide ESD protection and particulate barrier functions, eliminating the need for complex maintenance procedures during operation. The layers are designed to be replaced as a unit when necessary, simplifying maintenance.
3Adaptability or versatility
If flexible displays are used without physical barriers, then display flexibility is improved, but ESD susceptibility increases
Solution Approach 1:
The protective layers are designed as thin, flexible films that can conform to curved and flexible display configurations. The first protective layer provides physical protection while maintaining flexibility, and the ESD protection layer provides electrostatic discharge protection without rigid structures, resolving the contradiction between flexibility and ESD protection.
4Reliability
If ESD layer is placed close to LEDs, then ESD protection effectiveness is improved, but risk of electrical damage increases
Solution Approach 1:
The first protective layer serves as an insulating intermediary between the ESD protection layer and the LEDs, allowing the ESD layer to be positioned close to the LEDs for effective ESD protection while the insulating layer prevents direct electrical contact and potential damage to the LEDs.
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 solution effectively protects LEDs from external ESD, preserving image quality and reducing maintenance, ensuring reliable operation of flexible secondary display assemblies in gaming machines.
Implementation Method 1
an electrostatic discharge (ESD) layer physically coupled to the insulation layer and physically spaced apart from the LEDs, the ESD layer being electrically conductive to guide electrostatic discharge away from the LEDs, wherein the ESD layer is electrically isolated from the display circuitry by the insulation layer
Implementation Method 2
the ESD layer being electrically conductive to guide electrostatic discharge away from the LEDs
Data Source
AI summary
Gaming systems and methods are described herein for gaming machines including a primary display configured to present primary game video data and at least one secondary display assembly configured to present secondary game video data. The secondary display assembly includes a plurality of light emitting diodes (LEDs) configured to present video data towards an external area surrounding the gaming machine, a display substrate coupled to the LEDs and including display circuitry electrically coupling the LEDs together for presenting the secondary game video data, an insulation layer physically coupled to the display substrate and surrounding the LEDs, and an electrostatic discharge (ESD) layer physically coupled to the insulation layer and physically spaced apart from the LEDs, the ESD layer being electrically conductive to guide electrostatic discharge away from the LEDs, wherein the ESD layer is electrically isolated from the display circuitry by the insulation layer.