Display Device Sensor Controller Timing Variation

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Solution Overview

Problem

Display devices experience degradation in display quality due to noise interference from input sensors, which affects user experience and image clarity.

Innovation Solution

A display device design that includes a display panel, an input sensor, a panel driver, and a sensor controller, where the sensor controller receives synchronization signals from the panel driver and generates varying transmission signals based on these signals to minimize noise interference by randomly varying the output timing of transmission signals relative to the synchronization signal, thereby reducing signal interference and flicker phenomena.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the input sensor operates continuously to sense external inputs, then the sensor responsiveness is improved, but noise interference and signal degradation occur due to fixed timing operations

Engineering Contradiction:
Improvesensor responsivenessVSAvoidnoise interference
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent applies dynamics by changing the timing of transmission signals from fixed to variable. The sensor controller adjusts the transmission signal timing dynamically based on the synchronization signal, creating a time-shifted transmission pattern that avoids fixed-timing interference and reduces noise interference while maintaining sensor responsiveness.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent utilizes periodic action through the synchronization signal that periodically resets the transmission signal timing. This periodic adjustment creates a cyclic time-shifting pattern that systematically avoids interference at fixed intervals while maintaining continuous sensor operation.

Inventive Principle:
Principle #19Periodic action

2Stability of the object's composition

If the transmission signals are transmitted at fixed timing, then the signal transmission stability is improved, but signal interference and flicker phenomena increase

Engineering Contradiction:
Improvesignal transmission stabilityVSAvoidsignal interference
Core Design Contradiction:
Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The patent transforms the fixed timing into variable timing by dynamically adjusting the transmission signal based on the synchronization signal. This dynamic timing adjustment breaks the fixed pattern that causes interference while maintaining stable signal transmission through controlled variability.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent changes the timing parameter of the transmission signal from a fixed value to a variable value that shifts over time. This parameter change in timing creates a time-shifted transmission pattern that avoids fixed-timing interference and reduces flicker phenomena while maintaining transmission stability.

Inventive Principle:
Principle #35Parameter changes

3Device complexity

If the input sensor is integrated on the display panel, then the device integration is improved, but noise from the input sensor degrades display quality

Engineering Contradiction:
Improvedevice integrationVSAvoiddisplay quality degradation
Core Design Contradiction:
Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent resolves the integration conflict by applying dynamic timing adjustment to the transmission signals from the integrated input sensor. The sensor controller varies the transmission timing based on synchronization signals, which reduces noise interference and allows the integrated sensor to operate without degrading display quality.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent converts the harmful fixed-timing interference into a beneficial variable-timing pattern. By intentionally varying the transmission timing based on synchronization signals, the system transforms the potential harm of integrated sensor noise into a beneficial time-shifted transmission pattern that reduces interference and improves display quality.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS11893187B2Display device in which transmission signals are varyingly generated based on a synchronization signal
Publication Date: 2024.02.06 SAMSUNG DISPLAY CO LTD
  • US11893187B2 patent drawing
  • US11893187B2 patent drawing
  • US11893187B2 patent drawing

AI summary

A display device including: a display panel configured to display an image in units of a frame; an input sensor disposed on the display panel, and configured to sense an external input; a panel driver configured to control driving of the display panel in response to a synchronization signal; and a sensor controller configured to control driving of the input sensor, wherein the sensor controller receives the synchronization signal from the panel driver and outputs a plurality of transmission signals to the input sensor, and the plurality of transmission signals are varyingly generated based on the synchronization signal.