Pixel Circuit Layout for High-Definition Display
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Solution Overview
Problem
Image display devices, particularly organic electroluminescence (EL) devices, face challenges in reducing pixel area size to achieve high-definition images, as the increased area ratio of circuit elements within the pixel area complicates the efficient arrangement of pixel circuits.
Innovation Solution
The image display device arranges pixel circuits with protruding portions towards adjacent pixel areas, incorporating a margin for layer misalignment and including a gate electrode of a thin film transistor, allowing for efficient layout and control of organic electroluminescence elements to emit light at desired luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixel area size is reduced to achieve high-definition display, then image definition is improved, but the area ratio of circuit elements increases making it difficult to contain all circuit elements within the pixel area
Solution Approach 1:
The pixel area is segmented into multiple regions: a first pixel area containing some circuit elements, and a second pixel area containing remaining circuit elements. This segmentation allows circuit elements to be distributed across adjacent pixel areas, reducing the area ratio within each individual pixel area while maintaining high-definition display capabilities.
Solution Approach 2:
The patent extends the arrangement of circuit elements from a single pixel area into adjacent pixel areas, effectively utilizing spatial dimensions beyond the traditional pixel boundary. This dimensional extension allows circuit elements to be distributed more efficiently across the display area.
2Measurement precision
If pixel area size is reduced, then high-definition image display is achieved, but the layout flexibility of pixel circuits deteriorates due to increased circuit element density
Solution Approach 1:
By segmenting circuit elements across multiple pixel areas, the patent provides greater layout flexibility. Different types of circuit elements can be strategically placed in different pixel areas, allowing optimized arrangements that maintain both high-definition display and circuit layout adaptability.
Solution Approach 2:
The patent applies local quality by placing different circuit elements in different regions. Specific circuit elements are positioned in the first pixel area while others are positioned in the second pixel area, allowing each region to be optimized for its specific function while maintaining overall layout flexibility.
3Device complexity
If more circuit elements are contained within a pixel area, then pixel circuit functionality is improved, but the pixel area size must increase reducing display resolution
Solution Approach 1:
The patent segments the pixel circuit functionality across multiple pixel areas. By distributing circuit elements between a first pixel area and a second pixel area, the patent maintains comprehensive pixel circuit functionality while keeping each individual pixel area size small enough to support high display resolution.
Solution Approach 2:
Adjacent pixel areas serve multiple functions: they not only display image information but also house circuit elements for neighboring pixels. This multi-functionality allows circuit elements to be utilized across pixel boundaries, maintaining functionality without increasing individual pixel area size.
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
This configuration enables efficient arrangement and operation of pixel circuits within the display area, improving the layout flexibility and maintaining normal TFT operation despite potential misalignment, thereby enhancing the display's ability to produce high-definition images.
Implementation Method 1
organic electroluminescence elements (hereinafter, referred to as organic EL elements) as light emitting elements
Data Source
AI summary
Provided is an image display device for displaying an image by causing a light emitting element to emit light, the light emitting element being disposed in each of a plurality of pixel areas which are defined by dividing a display area into a grid pattern, the image display device including a pixel circuit for controlling light emission of the light emitting element disposed in each of the plurality of pixel areas, the pixel circuit being formed in an area having a portion that protrudes from the pixel area of the pixel circuit toward an adjacent pixel area and a portion where an adjacent pixel area protrudes into the pixel area.