Shift Register Unit for TDDI Touch Display Integration

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Solution Overview

Problem

Traditional touch and display driver integrated (TDDI) systems degrade the displaying effect by reducing the displaying period and inserting the touch controlling period into it, leading to a significant decrease in display performance.

Innovation Solution

A shift register unit with a gate line driving circuit and a touch-controlled circuit that uses pulse signals to manage the transition between touch controlling and displaying stages, allowing for bidirectional scanning without reducing the displaying period, utilizing thin-film transistors and clock signals to control the stages effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the touch controlling period is inserted into the displaying period, then the touch controlling function can be implemented, but the displaying period is reduced and the displaying effect is degraded

Engineering Contradiction:

Improvetouch controlling functionVSAvoiddisplaying period

Core Design Contradiction:

Adaptability or versatilityVSDuration of action of moving object

Solution Approach 1:

The patent segments the driving cycle into distinct displaying period and touch controlling period, where the touch controlling period is placed after the displaying period rather than inserting it within the displaying period. This segmentation allows both functions to operate independently without compromising the displaying duration.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements periodic action by alternating between displaying period and touch controlling period in a sequential manner. The touch controlling period is triggered after the displaying period ends, creating a regular periodic cycle that maintains both functions' effectiveness.

Inventive Principle:

Principle #19Periodic action

2Adaptability or versatility

If the displaying period is reduced to accommodate touch controlling, then the touch controlling effect is improved, but the displaying effect is significantly degraded

Engineering Contradiction:

Improvetouch controlling effectVSAvoiddisplaying effect

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent applies preliminary action by completing the displaying period fully before initiating the touch controlling period. The displaying function is performed first and completely, then the touch controlling function is activated afterward, ensuring that displaying effectiveness is not compromised.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent maintains continuity of useful action by ensuring that the displaying period is completed without interruption before touch controlling begins. Both periods are executed sequentially and completely, maintaining the continuity and effectiveness of both displaying and touch controlling functions.

Inventive Principle:

Principle #20Continuity of useful action

3Device complexity

If traditional TDDI driver integrates touch and display drivers, then the device complexity is reduced, but the displaying period is reduced and displaying effect is degraded

Engineering Contradiction:

Improvedriver integrationVSAvoiddisplaying period

Core Design Contradiction:

Device complexityVSDuration of action of moving object

Solution Approach 1:

The patent introduces dynamic control mechanisms including a touch-controlled turning-on module and touch-controlled turning-off module that dynamically switch between touch controlling and displaying modes. This dynamic control allows the system to maintain full displaying period while integrating touch controlling functionality.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the temporal parameter arrangement by placing the touch controlling period after the displaying period rather than overlapping or interrupting the displaying period. This parameter change in timing sequence allows both integrated driver functions to operate without reducing the displaying duration.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10146362B2Shift register unit, a shift register, a driving method, and an array substrate

Publication Date: 2018.12.04 BOE TECHNOLOGY GROUP CO LTD

AI summary

The disclosure provides a shift register unit, a shift register, a driving method and an array substrate. The shift register unit may comprise a touch-controlled circuit comprising a touch-controlled turning-on module and a touch-controlled turning-off module, wherein a control of the touch-controlled turning-on module is connected to a touch-controlled turning-on signal, an input is connected to a negative power supply signal, and an output is connected to an output terminal, and the touch-controlled turning-on signal is a pulse signal at a start of a touch controlling period; and a control of the touch-controlled turning-off module is connected to a touch-controlled turning-off signal, an input of the touch-controlled turning-off module is connected to a positive power supply signal, and an output of the touch-controlled turning-off module is connected to the output terminal, wherein the touch-controlled turning-off signal is a pulse signal at an end of the touch controlling period.