Transmissive Display Synchronization Using Mechanical Reel Position Sensing

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Solution Overview

Problem

Existing gaming machines face challenges in synchronizing video graphics with mechanical reels, particularly when using transmissive displays, due to signal timing and position sensor accuracy issues.

Innovation Solution

A gaming machine with a transmissive video display positioned in front of mechanical reels, utilizing a rotatable element sensor arrangement that includes a home position sensor and magnetic field-type rotation sensor to accurately detect the rotational position of each reel, allowing synchronized graphic display elements to move in alignment with the reel symbols.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a transmissive video display is positioned in front of mechanical reels, then the visual presentation is enhanced, but synchronization accuracy deteriorates due to signal timing and position sensor issues

Engineering Contradiction:

Improvevisual presentation qualityVSAvoidsynchronization accuracy

Core Design Contradiction:

Illumination intensityVSMeasurement precision

Solution Approach 1:

The patent replaces mechanical position detection methods with optical sensing. A photoelectric sensor detects the position of mechanical reels by sensing light patterns, eliminating the need for complex mechanical encoders or physical markers on the reels. This optical detection system provides more accurate and reliable position feedback for synchronization.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary processing system that receives position data from the photoelectric sensor and generates corrected synchronization signals. This intermediary layer compensates for timing delays and signal processing variations, ensuring accurate synchronization between the video display and mechanical reel positions.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If photoelectric detectors with notches are used to detect rotational position, then position detection is achieved, but device complexity increases due to multiple sensors and notch structures

Engineering Contradiction:

Improverotational position detectionVSAvoidsensor arrangement complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent extracts the position detection function from complex mechanical notch structures and separates it into a dedicated photoelectric sensing system. The notches are simplified to minimal markers, and the primary detection function is performed by the photoelectric sensor, allowing for easier manufacturing and maintenance.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The photoelectric sensor system serves multiple functions: detecting reel position, determining rotation direction, and providing speed information. This multi-functional approach eliminates the need for separate mechanical detectors for each parameter, reducing overall system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Ensures precise synchronization of video graphics with mechanical reels, enhancing the gaming experience by maintaining the alignment and movement of graphic elements with the symbols displayed on the mechanical reels.

Implementation Method 1

Methodology Applied

Scientific EffectMagnetic field sensing: Magnetic Field

Implementation Method 2

A transmissive video display is positioned in front of the mechanical reel display

Methodology Applied

Scientific EffectLight transmission: Light

Data Source

PatentUS12380762B2Gaming machine and method with transmissive display and mechanical reels

Publication Date: 2025.08.05 EVERI GAMES INC

AI summary

A gaming machine, method, and program product provide for control of a transmissive video display positioned in front of a mechanical reel display. At least one electronic controller operating the gaming machines causes reels to spin and stop to display symbols on selected symbol locations visible through the transmissive video display. While the reels are spinning, a position indicator from the mechanical reel display indicating a current position of each reel, and graphic display elements are shown using the transmissive video display, the graphic display elements controlled to move along with selected ones of the symbols based on the position indicator and a first delay characteristic associated with the transmissive video display.