Display Device Pixel Circuit Segmentation for Fast Driving

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Solution Overview

Problem

Existing display devices face challenges in achieving fast driving while maintaining high resolution, primarily due to limitations in pixel circuit design and capacitor configuration.

Innovation Solution

The display device incorporates a substrate with multiple semiconductor layers, including polycrystalline and oxide semiconductors, along with a specific capacitor configuration that separates compensation and data writing operations, allowing for efficient fast driving and high resolution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional capacitor configuration is used in pixel circuits, then device complexity is reduced, but driving speed and resolution performance deteriorate

Engineering Contradiction:
Improvedriving speedVSAvoidcapacitor configuration complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The pixel circuit is divided into multiple independent transistor units (first transistor, second transistor, third transistor, fourth transistor, fifth transistor, sixth transistor) with separate gate control. Each transistor is configured with specific gate electrodes (first gate electrode, second gate electrode, third gate electrode, fourth gate electrode, fifth gate electrode, sixth gate electrode) that can be independently controlled, enabling parallel processing of compensation and data writing operations simultaneously, thus improving driving speed without excessive complexity increase.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Multiple gate electrodes are stacked in a vertical arrangement above the semiconductor layer, creating a three-dimensional transistor configuration. This vertical stacking allows multiple control signals to be applied from different dimensions, enabling sophisticated pixel operations (compensation, data writing, emission control) to be performed concurrently, thereby achieving fast driving capability while maintaining manageable device complexity.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Manufacturing precision

If high resolution is achieved, then display quality is improved, but pixel circuit performance and driving speed deteriorate

Engineering Contradiction:
Improvedisplay resolutionVSAvoidpixel circuit driving speed
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The pixel circuit is segmented into multiple specialized transistor units, each responsible for specific functions (compensation, data writing, emission control). This functional segmentation allows the pixel circuit to handle high-resolution data processing efficiently by distributing operations across multiple parallel pathways, preventing performance degradation despite increased resolution requirements.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The multi-gate transistor configuration provides universal functionality within each pixel, where the same transistor structure can perform compensation, data writing, and emission control operations by applying different control signals to different gate electrodes. This multi-functionality ensures that pixel circuit performance is maintained across various operational modes, enabling fast driving capability even at high resolutions.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS12289972B2Display device
Publication Date: 2025.04.29 SAMSUNG DISPLAY CO LTD
  • US12289972B2 patent drawing
  • US12289972B2 patent drawing
  • US12289972B2 patent drawing

AI summary

Provided is display device comprising a substrate; a first semiconductor layer disposed on the substrate and having a plurality of transistors; a second semiconductor layer disposed on the first semiconductor layer and having a plurality of transistors; a first data conductive layer disposed on the second semiconductor layer; a first metal layer disposed on the first data conductive layer; and a second metal layer disposed on the first metal layer, wherein the first metal layer includes a first storage electrode and a first input electrode, the second metal layer includes a second storage electrode and a second input electrode, the first storage electrode and the second storage electrode configure a storage capacitor, and the first input electrode and the second input electrode configure an input capacitor.