Shift Register Circuitry for Narrow Frame Displays

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing shift register circuits for liquid crystal displays face challenges in achieving high resolution and narrow frames while maintaining low power consumption and a simple structure, particularly in reducing noise voltage and improving yield rates.

Innovation Solution

The proposed shift register circuitry includes two shift register units sharing a pull-down sub-circuit and a storage sub-circuit, which maintains the potential of the pull-down node, allowing continuous discharge and reducing noise voltage, thereby reducing the number of transistors and power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of moving object

If traditional shift register circuits are used in liquid crystal displays, then the display can achieve basic driving functions, but the frame width increases and resolution decreases

Engineering Contradiction:

Improvedisplay resolutionVSAvoidframe width

Core Design Contradiction:

Area of moving objectVSLength of moving object

Solution Approach 1:

The patent merges two shift register units into a single integrated circuit structure that shares common components including the pull-down sub-circuit, storage sub-circuit, and control logic. This consolidation reduces the overall occupation area and enables narrower frame width while maintaining high resolution display capabilities

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The shared pull-down sub-circuit and storage sub-circuit serve multiple functions: they control both shift register units, maintain signal potentials, and enable noise reduction for both units simultaneously. This multi-functionality reduces the total component count and occupation area

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Loss of energy

If traditional shift register circuits are used, then basic signal driving is achieved, but power consumption increases

Engineering Contradiction:

Improvepower consumptionVSAvoidsignal stability

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

By merging the pull-down control logic and storage functions into shared sub-circuits that serve both shift register units, the patent reduces the total number of active components and their associated power consumption while maintaining signal stability through the shared storage sub-circuit

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The storage sub-circuit automatically maintains the potential of the pull-down node without requiring external intervention, and the shared control logic self-regulates the driving signals for both units, reducing overall power consumption while ensuring reliable operation

Inventive Principle:

Principle #25Self-service

3Object-affected harmful factors

If traditional shift register circuits are used, then signal transmission is achieved, but noise voltage increases

Engineering Contradiction:

Improvenoise voltageVSAvoidyield rate

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The shared storage sub-circuit acts as an intermediary that stabilizes the potential of the pull-down node, preventing noise voltage fluctuations from affecting both shift register units. This intermediary storage function filters out noise and ensures clean signal transmission

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The circuit employs feedback mechanisms where the storage sub-circuit continuously monitors and maintains the pull-down node potential, and the shared control logic adjusts driving signals based on the state of both shift register units, thereby reducing noise voltage and improving yield rate

Inventive Principle:

Principle #23Feedback

4Device complexity

If separate pull-down circuits are used for each shift register unit, then signal control is precise, but device complexity increases

Engineering Contradiction:

Improvecircuit structureVSAvoidsignal control precision

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent combines the pull-down control functions for both shift register units into a single shared pull-down sub-circuit with common control logic, significantly reducing device complexity while maintaining manufacturing precision through the unified control mechanism

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The shared pull-down sub-circuit is designed to universally control both shift register units through common control signals and integrated logic, achieving precise signal control for both units without requiring separate dedicated circuits, thus reducing overall complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10891913B2Shift register circuitry, gate driving circuit, and display device

Publication Date: 2021.01.12 BOE TECHNOLOGY GROUP CO LTD

AI summary

The present disclosure provides a shift register circuitry, a gate driving circuit, and a display device. The shift register circuitry of the present disclosure includes a first shift register unit, a second shift register unit, a pull-down control sub-circuit (20), and a pull-down sub-circuit (30); wherein the first shift register unit includes a first input Sub-circuit (11), a first output sub-circuit (12), a first reset sub-circuit, and a first noise reduction sub-circuit (14); a second shift register unit includes a second input sub-circuit (21), a second output sub-circuit (22), a second reset sub-circuit and a second noise reduction sub-circuit (24).