Bias Control Signal Driver Circuit for Pixel Arrays

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Solution Overview

Problem

Conventional voltage and current source circuits for pixel arrays require additional complex bias signal generation ICs to provide bias signals, increasing circuit costs and complexity.

Innovation Solution

An electronic device with a pixel array, a gate driver, and a bias control signal driver that generates bias signals using part of the gate control signals, eliminating the need for a separate bias signal generation IC.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a separate bias signal generation IC is added to provide bias signals to pixel units, then the bias signal provision function is achieved, but the circuit complexity and cost increase

Engineering Contradiction:

Improvebias signal provisionVSAvoidcircuit complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent integrates the bias signal generation function into the gate driver IC by adding a bias control signal driver unit that receives gate control signals and generates bias signals internally. This merging of functions eliminates the need for a separate bias signal generation IC, thereby reducing circuit complexity while maintaining the reliability of bias signal provision to pixel units

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If a separate bias signal generation IC is added to provide bias signals to pixel units, then the bias signal provision function is achieved, but the circuit cost increases

Engineering Contradiction:

Improvebias signal provisionVSAvoidcircuit cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent combines the bias signal generation function with the gate driver IC, eliminating the need for a separate bias signal generation IC component. This integration reduces the total component count and circuit cost while ensuring reliable bias signal provision to pixel units through the integrated bias control signal driver

Inventive Principle:

Principle #5Merging (Combining)

3Device complexity

If conventional voltage source circuit or current source circuit is used without integrated bias control, then the circuit structure is simple, but the threshold voltage compensation cannot be implemented

Engineering Contradiction:

Improvecircuit structureVSAvoidthreshold voltage compensation

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent integrates the bias control signal driver unit into the gate driver IC, combining the simplicity of the conventional circuit structure with the functionality needed for threshold voltage compensation. The integrated unit receives gate control signals and generates appropriate bias signals to enable threshold voltage compensation in pixel units without requiring a completely separate bias generation IC

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The gate driver IC is designed with multi-functionality, serving both as a gate control signal generator and as a bias signal generator through the integrated bias control signal driver. This universal design enables threshold voltage compensation while maintaining a relatively simple circuit structure by eliminating the need for separate dedicated bias generation hardware

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11790838B2Electronic device comprising a novel bias control signal driver circuit

Publication Date: 2023.10.17 INNOLUX CORP

AI summary

An electronic device is provided. The electronic device includes a pixel array, a gate driver and a bias control signal driver. The pixel array includes a pixel unit. The gate driver is configured to generate a plurality of gate control signals. The bias control signal driver is electrically connected to the pixel unit and the gate driver. The bias control signal driver is configured to generate a bias signal to drive the pixel unit according to a part of the plurality of gate control signals.