Display Substrate Circuit Sharing for Higher Pixel Density

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Solution Overview

Problem

OLED display substrates face challenges in achieving high resolution due to the large area occupied by sub-pixels, which include light-emitting drive circuits and reset circuits.

Innovation Solution

The display substrate design allows at least two sub-pixels to share the same reset circuit and/or compensation circuit, reducing the number of circuits required and minimizing the occupied area, thereby facilitating high-resolution displays.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If each sub-pixel includes dedicated reset circuit and compensation circuit, then the reliability of light-emitting element control is improved, but the area occupied by sub-pixels increases

Engineering Contradiction:
Improvecontrol reliabilityVSAvoidsub-pixel area
Core Design Contradiction:
ReliabilityVSArea of stationary object

Solution Approach 1:

The patent merges the reset circuit and compensation circuit into a shared target circuit that serves multiple sub-pixels. Specifically, one target circuit is designed to provide reset signals to multiple light-emitting elements, and another target circuit provides compensation signals to multiple light-emitting drive circuits. This consolidation reduces the total number of circuits while maintaining functional reliability through shared resource architecture.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The target circuit is designed with multi-functionality to serve multiple sub-pixels simultaneously. The reset circuit in the target circuit can reset multiple light-emitting elements, and the compensation circuit can compensate for multiple light-emitting drive circuits. This universal design allows a single circuit to perform the functions that would traditionally require separate dedicated circuits for each sub-pixel.

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

2Productivity

If the number of circuits in each sub-pixel is reduced, then the pixel density (PPI) is improved, but the circuit sharing complexity increases

Engineering Contradiction:
Improvepixel densityVSAvoidcircuit sharing complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the circuit functions into distinct target circuits that can be shared across multiple sub-pixels. By dividing the reset function and compensation function into separate target circuits, the patent manages complexity through functional segmentation rather than requiring each sub-pixel to have complete independent circuitry. This segmentation allows for systematic sharing while maintaining clear functional boundaries.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent resolves circuit sharing complexity by transitioning from a one-to-one mapping (each sub-pixel has dedicated circuits) to a many-to-one mapping (multiple sub-pixels share target circuits). This dimensional change in the circuit-sub-pixel relationship reduces the total circuit count and enables higher pixel density while managing complexity through scalable sharing architecture.

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

Data Source

PatentUS12431079B2Display substrate and display device
Publication Date: 2025.09.30 HEFEI BOE ZHUOYIN TECH CO LTD
  • US12431079B2 patent drawing
  • US12431079B2 patent drawing
  • US12431079B2 patent drawing

AI summary

Provided is a display substrate, including: a base substrate; a plurality of sub-pixels arranged in an array on the base substrate, each of the sub-pixels including a light-emitting drive circuit, a reset circuit, a compensation circuit and a light-emitting element; wherein the light-emitting drive circuit and the reset circuit are connected to the light-emitting element, the light-emitting drive circuit is configured to provide a drive signal to the light-emitting element, and the reset circuit is configured to provide a reset signal to the light-emitting element; the compensation circuit is connected to the light-emitting drive circuit, and the compensation circuit is configured to provide a compensation signal to the light-emitting drive circuit; wherein at least two of the sub-pixels share a same target circuit, and the target circuit includes at least one of the reset circuit and the compensation circuit.