Instant Messaging Friend Segmentation for Non-Blocking Chat Display

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Solution Overview

Problem

Existing instant messaging services lack the ability to distinguish between different types of friends, specifically addressing the challenges of removing elemental mercury (Hg0) from flue gas and oxidized mercury (Hg2+), with existing technologies being costly and their efficiency affected by NOx and SO2.

Innovation Solution

Utilization of metal sulfides (e.g., FeS2, CuS, CuFeS2) as mercury removal adsorbents, which contact with flue gas and waste liquid, adsorbing and converting Hg0 from flue gas and Hg2+ from waste liquid into stable mercury sulfide compounds.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If chat messages from all friends are displayed uniformly, then all users can receive messages, but users cannot distinguish between different friend types and promotional content becomes indistinguishable from personal messages

Engineering Contradiction:
Improvefriend type distinctionVSAvoidmessage display system
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The patent segments friends into different types (first type and second type) and applies different display rules for their chat messages. Messages from second type friends are displayed without overlaying the user input window, while messages from first type friends use the conventional overlay display. This segmentation allows users to distinguish between personal messages and promotional/advertising messages from second type friends.

Inventive Principle:
Principle #1Segmentation

2Ease of operation

If user input window is always overlaid on chat window, then users can easily reply to messages, but messages from second type friends interfere with user input capability

Engineering Contradiction:
Improvemessage reply capabilityVSAvoidinput interference from promotional messages
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent applies different display qualities to chat messages based on the sender type. For messages from second type friends, the system uses a non-overlay display mode that does not block the user input window, while messages from first type friends use the conventional overlay mode. This local quality differentiation ensures that promotional messages do not interfere with user input capability while maintaining ease of operation for personal messages.

Inventive Principle:
Principle #3Local quality

3Adaptability or versatility

If all friends are treated equally, then the system is simple to manage, but users cannot receive targeted information based on location and interest

Engineering Contradiction:
Improvetargeted message deliveryVSAvoidfriend management system
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a dynamic friend management system where friends can be classified into different types based on their characteristics, location, and user interests. The system dynamically adjusts message display behavior based on the sender type, and allows users to add second type friends through recommendations based on matching criteria. This dynamic approach enables targeted information delivery while adapting to user needs.

Inventive Principle:
Principle #15Dynamics

4Productivity

If second type friends can send messages to all registered friends, then promotional content reaches wide audience, but users receive unwanted messages from friends they don't know

Engineering Contradiction:
Improvemessage transmission efficiencyVSAvoidunwanted promotional messages
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent implements a recommendation-based friend addition system where second type friends are recommended to users based on matching criteria such as location and interests. Users can selectively add recommended second type friends, and once added, these friends can send messages to the user. This feedback mechanism ensures that promotional content reaches only interested users who have actively chosen to receive such messages, reducing unwanted communications while maintaining transmission efficiency.

Inventive Principle:
Principle #23Feedback

Data Source

PatentEP3588995B1Method and system for providing an instant messaging service
Publication Date: 2026.05.20 KAKAO CORP
  • EP3588995B1 patent drawingFigure 1
  • EP3588995B1 patent drawingFigure 2
  • EP3588995B1 patent drawingFigure 3

AI summary

Provided is a technique for transmitting and receiving a chat message through a message server. A user may transmit and receive a chat message to and from a friend of a first type and may receive a chat message from a friend of a second type, and receive various chat messages from a company supporting the friend of the second type.