Display Panel Sensor Reset Timing for Efficient User Input Detection

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Solution Overview

Problem

Existing display devices face challenges in efficiently detecting user inputs while minimizing power consumption and reducing stress on sensors, particularly when user input is not imminent.

Innovation Solution

A display device with a sensor controller and driving controller that determines the timing for activating and deactivating reset control signals for sensors based on user input attempts and actual input, optimizing sensor operation and reducing unnecessary power usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If reset control signals are continuously activated for sensors, then user input detection reliability is improved, but power consumption increases and sensor stress increases

Engineering Contradiction:
Improveuser input detection reliabilityVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The reset control signal is activated periodically based on detected user input events rather than continuously. The controller detects when a user interacts with the display and triggers reset signals only at those specific moments, converting continuous operation into periodic operation to reduce power consumption while maintaining detection reliability.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The system performs preliminary detection of user input attempts before activating the reset control signal. By monitoring for user interaction first and then conditionally triggering the reset signal based on this preliminary detection, the system avoids unnecessary signal activation and associated power consumption.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If reset control signals are continuously activated for sensors, then user input detection reliability is improved, but sensor stress increases

Engineering Contradiction:
Improveuser input detection reliabilityVSAvoidsensor stress
Core Design Contradiction:
ReliabilityVSStress or pressure

Solution Approach 1:

The reset control signal is activated periodically based on detected user input events rather than continuously. This periodic activation pattern reduces the cumulative stress on sensors by limiting reset signal occurrences to only when user input is actually detected, while still maintaining reliable detection capability.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The system performs preliminary detection of user input attempts before activating the reset control signal. This preliminary action serves as a filter, ensuring that reset signals are only sent when genuinely needed, thereby protecting sensors from unnecessary stress while preserving detection reliability.

Inventive Principle:
Principle #10Preliminary action

3Measurement precision

If sensors are reset frequently, then detection accuracy is improved, but power consumption increases

Engineering Contradiction:
Improvedetection accuracyVSAvoidpower consumption
Core Design Contradiction:
Measurement precisionVSUse of energy by moving object

Solution Approach 1:

Sensor reset operations are performed periodically based on user input detection events rather than at fixed intervals or continuously. This event-driven periodic reset strategy maintains detection accuracy by resetting sensors when needed while avoiding unnecessary resets that would waste power.

Inventive Principle:
Principle #19Periodic action

Solution Approach 2:

The controller performs preliminary detection of user input before triggering sensor reset. This preliminary action ensures that reset operations are only initiated when user interaction is detected, optimizing the balance between maintaining detection accuracy and minimizing power consumption from unnecessary reset operations.

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 approach enhances the efficiency of user input detection by minimizing unnecessary sensor resets, reducing power consumption, and improving overall performance and reliability of the display device.

Implementation Method 1

Each of the sensors includes a light detector to detect user information

Methodology Applied
Scientific EffectPhotoelectric Effect: Photoelectric Effect

Data Source

PatentUS12367827B2Display device and method for driving the same
Publication Date: 2025.07.22 SAMSUNG DISPLAY CO LTD
  • US12367827B2 patent drawing
  • US12367827B2 patent drawing
  • US12367827B2 patent drawing

AI summary

A display device includes a display panel, a sensor controller, and a driving controller. The display panel includes a plurality of pixels, each of which includes a light emitter to emit light to display an image and a plurality of sensors. Each of the sensors includes a light detector to detect user information. The sensor controller is electrically connected with the sensors and is configured to provide a reset control signal to the plurality of sensors. The driving controller determines a first time point initiating when a user is able to attempt to input the user information, determines a second time point when the user information is actually input, and provides the sensor controller with an enable signal to activate the reset control signal after the first time point and deactivate the reset control signal after the second time point.