Subpixel Arrangement for Curved Display Quality
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Solution Overview
Problem
Recent light-emitting devices and display devices face challenges in achieving high visibility, high display quality, reliability, and low power consumption, particularly when designed for mobile devices that need to be thin, lightweight, and capable of being curved without breaking.
Innovation Solution
A display device with a unique arrangement of subpixels in different regions, where the normal direction of one region differs from another, and the subpixels are arranged in a specific pattern (H or V arrangement) to improve display quality and reduce variations, combined with a lightweight and flexible substrate structure that includes a light-emitting element and a transistor for efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the display device uses a conventional uniform subpixel arrangement, then the manufacturing process is simple, but the display quality varies significantly when the device is bent or curved
Solution Approach 1:
The patent applies local quality by differentiating the subpixel arrangement between two regions: the first region (display region) uses a conventional arrangement while the second region (non-display region) uses an inverted arrangement. This localized differentiation ensures that when the device is bent, the non-display region's inverted arrangement compensates for optical distortions, maintaining display quality consistency across the entire device without requiring complex rearrangement of all subpixels.
Solution Approach 2:
The patent employs asymmetry by inverting the arrangement direction of subpixels in the non-display region relative to the display region. Instead of using a symmetric uniform arrangement throughout, the inverted arrangement in the second region creates an asymmetric structure that specifically addresses the optical distortions caused by bending, thereby improving display quality consistency without excessive complexity.
2Adaptability or versatility
If the display device is designed to be thin and flexible, then it can be applied to mobile devices and curved surfaces, but it becomes more susceptible to breaking and has reduced reliability
Solution Approach 1:
The patent utilizes flexible substrates (plastic substrates) for both the first and second substrates, enabling the display device to be thin, lightweight, and capable of being bent or curved. This principle directly addresses the adaptability requirement while the inverted subpixel arrangement in the non-display region compensates for the reliability concerns by correcting optical distortions that would otherwise be exacerbated by the flexible structure's deformation.
3Weight of moving object
If the display device uses a lightweight and flexible substrate structure, then it meets mobile device requirements, but the structural strength and stability are reduced
Solution Approach 1:
The patent employs plastic substrates instead of traditional glass substrates, significantly reducing the device weight and enabling flexibility. The thin-film structure of the plastic substrates meets mobile device requirements for lightweight and portable designs, while the inverted subpixel arrangement in the non-display region compensates for the reduced structural strength by maintaining optical performance stability during bending.
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 results in a display device with high visibility, high display quality, improved reliability, and reduced power consumption, making it suitable for mobile devices that require thin, lightweight, and flexible designs without compromising on performance.
Implementation Method 1
light-emitting elements utilizing EL (also referred to as EL elements) have features such as ease of thinning and lightening, high-speed response to input signals, and driving with a DC low voltage source
Implementation Method 2
The subpixel 165R includes a light-emitting element 125 and a coloring layer 266R. The subpixel 165G includes the light-emitting element 125 and a coloring layer 266G. The subpixel 165B includes the light-emitting element 125 and a coloring layer 266B. The light 235 emitted from the light-emitting element 125 is colored when passing the coloring layer.
Data Source
AI summary
A display device having high display quality is provided. In the display device that includes a plurality of display regions having different normal directions, the arrangement directions of a plurality of subpixels included in pixels vary between the display regions.