Display Pixel Circuits for Direct Multi-Resolution Output

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Solution Overview

Problem

Display devices face challenges in handling high-resolution image data without increasing power consumption and processing delays, particularly in converting image data between different resolutions, which requires dedicated circuits and leads to increased circuit scale and power consumption.

Innovation Solution

A display device with a pixel circuit design utilizing transistors and capacitors, including metal oxide semiconductors, allows for direct image data input without conversion by using storage nodes and capacitive coupling to adjust image data, enabling simultaneous display of multiple resolutions and superimposed images with low power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If dedicated conversion circuits are used to convert image data between different resolutions, then display adaptability is improved, but power consumption increases

Engineering Contradiction:

Improvedisplay adaptabilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The pixel circuit is designed to perform multiple functions: it can directly display high-resolution image data when available, or perform up-conversion of low-resolution image data when high-resolution data is not available. This multi-functionality eliminates the need for separate dedicated conversion circuits, thereby reducing power consumption while maintaining display adaptability across different resolution scenarios.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If up conversion processing is performed to generate high-resolution image data from low-resolution data, then display resolution is improved, but processing delay increases

Engineering Contradiction:

Improvedisplay resolutionVSAvoidprocessing delay

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The pixel circuit performs up-conversion processing in advance during periods when high-resolution image data is not being displayed. By preparing up-converted data beforehand and storing it in the pixel circuit's storage nodes, the circuit eliminates the need for real-time conversion during high-resolution display periods, thereby reducing processing delay while maintaining high display resolution.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If image data conversion is performed to match display device resolution, then display compatibility is improved, but circuit complexity increases

Engineering Contradiction:

Improvedisplay compatibilityVSAvoidcircuit complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The invention merges the image data conversion function directly into the pixel circuit by integrating up-conversion circuitry with the display pixel structure. This consolidation eliminates the need for separate dedicated conversion circuits, thereby reducing overall circuit complexity while maintaining display compatibility across different resolution scenarios.

Inventive Principle:

Principle #5Merging (Combining)

4Measurement precision

If analysis of enormous image data is performed for up conversion, then image quality is improved, but processing load increases

Engineering Contradiction:

Improveimage qualityVSAvoidprocessing load

Core Design Contradiction:

Measurement precisionVSPower

Solution Approach 1:

The pixel circuit performs partial up-conversion processing by generating only the necessary high-resolution data points needed for display, rather than processing the entire image data set. This selective processing approach maintains image quality while significantly reducing the processing load and power consumption associated with analyzing enormous amounts of image data.

Inventive Principle:

Principle #16Partial or excessive action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution enables proper display without image data conversion, reduces power consumption, and enhances reliability by using metal oxide transistors with low off-state current, allowing for efficient handling of high-resolution images and superimposed displays.

Implementation Method 1

utilizing transistors and capacitors, including metal oxide semiconductors, allows for direct image data input without conversion by using storage nodes and capacitive coupling to adjust image data

Methodology Applied

Scientific EffectCapacitive coupling: Capacitance

Implementation Method 2

enhances reliability by using metal oxide transistors with low off-state current

Methodology Applied

Scientific EffectLow off-state current: Electrical Resistance

Data Source

PatentUS12446309B2Display device and electronic device

Publication Date: 2025.10.14 SEMICON ENERGY LAB CO LTD

AI summary

A display device capable of performing proper display without image signal conversion is provided. In the case of high-resolution display, individual data is supplied to each pixel through a first signal line and a first transistor included in each pixel. In the case of low-resolution display, the same data is supplied to a plurality of pixels through a second signal line and a second transistor electrically connected to the plurality of pixels. When the number of image signals to be displayed is more than one and the image signals support different resolutions, display can be performed without up conversion or down conversion by switching an image signal supply path as described above.