Touch Electrode Code Patterns for Low-Compute Coordinate Detection

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Solution Overview

Problem

Current display devices require complex computation and correction processes to generate touch coordinate data, leading to increased cost and power consumption, and are limited in their application to various electronic devices due to size constraints.

Innovation Solution

Incorporating a display device with touch electrodes featuring code patterns that include cutouts corresponding to location information, allowing for the generation of touch coordinate data without complex computation, and enabling application across different electronic devices without size limitations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If complex computation and correction processes are used to generate touch coordinate data, then measurement precision is improved, but device complexity and power consumption increase

Engineering Contradiction:
Improvetouch coordinate data accuracyVSAvoidcomputation process complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-defining code patterns with cutouts at specific locations on the touch electrode before the touch input occurs. These code patterns encode location information in advance, so when a touch input is detected, the system can directly read the pre-encoded location data without performing complex computation or correction processes, thus resolving the contradiction between measurement precision and device complexity

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent uses copying by representing physical location information through code patterns that are copies or representations of actual positions. Instead of calculating coordinates from raw touch data, the system uses pre-coded pattern copies that directly represent location, eliminating the need for complex computation while maintaining accurate position detection

Inventive Principle:
Principle #26Copying

2Measurement precision

If complex computation and correction processes are used to generate touch coordinate data, then measurement precision is improved, but power consumption increases

Engineering Contradiction:
Improvetouch coordinate data accuracyVSAvoidpower consumption
Core Design Contradiction:
Measurement precisionVSUse of energy by moving object

Solution Approach 1:

By pre-encoding location information into code patterns with cutouts before the touch input occurs, the system eliminates the need for power-intensive computation and correction processes during actual touch detection. The pre-prepared code patterns allow direct reading of location data, significantly reducing power consumption while maintaining measurement precision

Inventive Principle:
Principle #10Preliminary action

3Ease of manufacture

If standard touch electrodes are used, then ease of manufacture is improved, but adaptability to various electronic devices is limited

Engineering Contradiction:
Improvetouch electrode productionVSAvoidapplication to electronic devices
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent achieves universality by designing touch electrodes with code patterns that can be integrated into various electronic devices regardless of size or application. The code pattern structure serves multiple functions: it maintains the basic touch detection capability while simultaneously encoding location information, making the touch electrode adaptable to different electronic devices without requiring separate customization for each application

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS11934618B2Display device and a touch input system including the same
Publication Date: 2024.03.19 SAMSUNG DISPLAY CO LTD
  • US11934618B2 patent drawing
  • US11934618B2 patent drawing
  • US11934618B2 patent drawing

AI summary

A display device including: a display unit including a plurality of emission areas which emit light; and a plurality of touch electrodes disposed on the display unit to detect a touch input, wherein at least some of the touch electrodes include a code pattern part including a plurality of code patterns that include cutouts corresponding to location inforniation.