Scan Shift Circuit Design for Embedded Touch Panels

Solution Overview

Problem

The complexity of component connections and increased production costs in touch and gate driving circuits for embedded touch panels result from the need for multiple control signals, leading to higher component counts and process difficulties.

Innovation Solution

A scan shift circuit and touch shift circuit design incorporating input, reset, latch control, and output circuits to simplify the structure and reduce component count, utilizing transistors and transmission gates to generate scanning signals efficiently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple control signals with different functions are inputted to achieve the required scanning signal output, then the scanning signal generation capability is improved, but the number of components and connection complexity increases

Engineering Contradiction:

Improvescanning signal generation capabilityVSAvoidcomponent connection complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies universality by designing a shift circuit where the same circuit structure and components can generate different types of scanning signals (gate scanning signals and touch scanning signals) by controlling the input signals. The shift circuit serves multiple functions: it can output gate scanning signals to gate lines and touch scanning signals to touch scanning lines, eliminating the need for separate dedicated circuits for each signal type. This multi-functional design reduces component count and connection complexity while maintaining the ability to generate various scanning signals as needed.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple control signals with different functions are inputted to achieve the required scanning signal output, then the scanning signal generation capability is improved, but the production cost increases

Engineering Contradiction:

Improvescanning signal generation capabilityVSAvoidproduction cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent merges previously separate gate driving circuit functions and touch driving circuit functions into a single integrated shift circuit. By combining the scanning signal generation capabilities for both gate lines and touch scanning lines into one circuit, the patent reduces the total number of components required, simplifies the manufacturing process, and lowers production costs. The merged circuit uses shared components and common signal paths to achieve both functions, making the manufacturing process more efficient and cost-effective.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If multiple control signals with different functions are inputted to achieve the required scanning signal output, then the scanning signal generation capability is improved, but the process difficulty increases

Engineering Contradiction:

Improvescanning signal generation capabilityVSAvoidprocess difficulty

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent applies universality by designing a shift circuit where the same circuit structure and components can generate different types of scanning signals (gate scanning signals and touch scanning signals) by controlling the input signals. The shift circuit serves multiple functions: it can output gate scanning signals to gate lines and touch scanning signals to touch scanning lines, eliminating the need for separate dedicated circuits for each signal type. This multi-functional design reduces component count and connection complexity while maintaining the ability to generate various scanning signals as needed.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11307707B2Scan shift circuit, touch shift circuit, driving method and related apparatus

Publication Date: 2022.04.19 BOE TECHNOLOGY GROUP CO LTD

AI summary

A scan shift circuit and its driving method, a touch shift circuit and its driving method, a gate driving circuit, a touch driving circuit and a display apparatus are disclosed. The scan shift circuit includes an input circuit, a reset circuit, a latch control circuit and a scan signal output circuit. The touch shift circuit includes an input circuit, a reset circuit, a latch control circuit, a cascade signal output circuit, a touch driving circuit and a touch signal output circuit.