Display Touch Electrodes with Code Patterns for Tilt Detection

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Solution Overview

Problem

Current display devices face challenges in accurately determining the arrangement direction and tilt of a position input device without complex calculations or the need for separate tilt sensors, which affects the precision of touch input operations and increases power consumption.

Innovation Solution

A display device with a display unit, touch electrodes, code patterns, and tilt sensing patterns formed using a light blocking member with varying light absorbent content, allowing the main processor to detect and analyze image data to determine the arrangement direction and tilt of a position input device, eliminating the need for separate tilt sensors and simplifying the input process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If separate tilt sensors are used to determine arrangement direction and tilt, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improvearrangement direction and tilt detection accuracyVSAvoidsystem structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent combines the tilt sensing function with the existing code pattern structure by integrating tilt sensing patterns into the display panel. Instead of adding separate tilt sensors, the system merges tilt detection capabilities into the same structural framework used for code pattern recognition, thereby determining both arrangement direction and tilt through a unified detection mechanism.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The display panel is designed to serve multiple functions: it not only displays information but also simultaneously performs code pattern recognition and tilt sensing. The same panel structure detects both the position codes for arrangement direction determination and the tilt patterns for orientation detection, eliminating the need for dedicated separate sensors.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If complex calculations are used to determine arrangement direction and tilt, then measurement precision is improved, but use of energy increases

Engineering Contradiction:

Improvearrangement direction and tilt detection accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The tilt sensing patterns are pre-formed on the display panel during manufacturing, creating a ready-to-detect optical structure. This preliminary preparation of the sensing patterns eliminates the need for complex real-time calculations during operation, as the system can directly interpret the optical signals from the pre-configured patterns to determine tilt and arrangement direction.

Inventive Principle:

Principle #10Preliminary action

3Measurement precision

If separate tilt sensors are added, then measurement precision is improved, but ease of manufacture deteriorates

Engineering Contradiction:

Improvearrangement direction and tilt detection accuracyVSAvoidmanufacturing process

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent integrates the tilt sensing functionality into the existing display panel manufacturing process. By combining the code pattern and tilt sensing pattern formation into a single integrated structure, the system eliminates the need for separate sensor components and their associated assembly steps, thereby simplifying the manufacturing process while maintaining detection accuracy.

Inventive Principle:

Principle #5Merging (Combining)

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 touch coordinate input with reduced power consumption and complexity, allowing for precise determination of the position input device's orientation without additional sensors, thereby enhancing user interaction and reducing energy usage.

Implementation Method 1

a plurality of tilt sensing patterns including a light absorbent disposed in an inner area or a peripheral area of each of the plurality of code patterns

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS11960667B2Display device and touch input system including the same

Publication Date: 2024.04.16 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a display unit including a plurality of emission areas, a plurality of touch electrodes that sense a touch, a plurality of code patterns formed in a preset code shape on partial areas of front surfaces of the plurality of touch electrodes, a plurality of tilt sensing patterns including a light absorbent disposed in an inner area or a peripheral area of each of the plurality of code patterns, and a main processor. The main processor receives detected image data corresponding to the plurality of tilt sensing patterns from a position input device, and determines arrangement direction information and tilt information of the position input device by comparing the detected image data with each other.