Ultrasonic Viewer Detection for Display Screen Control

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing display technologies, such as cameras and infrared detection methods, face limitations in accurately determining viewer presence for controlling electronic galleries or advertising screens, due to wide-angle range constraints and interference issues, leading to inefficient resource usage and inaccurate determinations.

Innovation Solution

The implementation of an ultrasonic detection system that emits beams in different directions to scan the viewable range, records echo properties, and compares them to reference values to determine viewer presence, allowing for precise control of the display screen's on-off status.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If camera or infrared detection methods are used to determine viewer presence, then the display screen can be controlled to turn on/off, but the detection accuracy is poor due to wide-angle range constraints and interference issues

Engineering Contradiction:

Improveviewer presence detection accuracyVSAvoidinterference and wide-angle range constraints

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent replaces optical detection systems (camera, infrared) with an ultrasonic detection system. The ultrasonic detection device emits ultrasonic beams and measures echo waves to determine viewer presence, eliminating the interference and wide-angle constraints that affect optical methods. This substitution of detection physics (acoustic vs. optical) resolves the contradiction by providing accurate detection without the harmful factors affecting optical systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces ultrasonic beams as an intermediary medium for detection. Instead of directly using camera or infrared sensors that are affected by wide-angle and interference issues, the system uses ultrasonic waves as a mediator to detect viewer presence through echo measurement, achieving accurate detection without the original constraints.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the display screen displays at all times to ensure visibility, then viewers can see content at any time, but energy consumption increases and resource usage becomes inefficient

Engineering Contradiction:

Improvevisibility availabilityVSAvoidenergy consumption

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The patent implements a feedback control system where the ultrasonic detection device continuously monitors viewer presence and sends signals to the control apparatus. Based on this feedback information, the display screen automatically adjusts its on-off state, achieving efficient energy management while maintaining visibility availability when needed.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent makes the display screen's operational state dynamic rather than static. Instead of displaying at all times, the screen dynamically adjusts its on/off status based on real-time viewer presence detection, optimizing energy consumption while ensuring content is available when viewers are present.

Inventive Principle:

Principle #15Dynamics

3Use of energy by moving object

If the display screen turns off frequently to save energy, then energy consumption decreases, but the response time to detect and serve viewers increases

Engineering Contradiction:

Improveenergy consumptionVSAvoidresponse time

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The patent employs preliminary action by having the ultrasonic detection device continuously monitor the environment even when the display screen is off. The detection system is already in place and active, so when a viewer approaches, the system can immediately detect and respond without delay, eliminating the response time penalty that would otherwise result from frequent on/off cycling.

Inventive Principle:

Principle #10Preliminary action

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

This solution enables accurate and efficient determination of viewer presence, allowing for automatic display control, reducing energy consumption and extending the display screen's lifetime by ensuring it turns on only when necessary.

Implementation Method 1

emitting, by the ultrasonic detection device, ultrasonic beams along different detecting directions to perform scanning in the viewable range, and recording a first property value of an echo wave of an ultrasonic beam emitted in each of the detecting directions

Methodology Applied

Scientific EffectUltrasonic echo detection: Echo

Data Source

PatentUS11221668B2Control method of display screen and control apparatus of display screen

Publication Date: 2022.01.11 BOE TECHNOLOGY GROUP CO LTD

AI summary

The present disclosure provides a control method of a display screen and a control apparatus of a display screen. The control method of a display screen of the present disclosure includes: detecting, using an ultrasonic detection device, whether there is a viewer present in a viewable range of the display screen, and generating a detection result; and controlling on-off status of the display screen according to the detection result.